Res.A.706(17) - World-Wide Navigational Warning Service

Annex 1 IMO/IHO World-Wide Navigational Warning Service - Guidance document

IMO/IHO World-Wide navigational warning service guidance document

1 Introduction

The original resolution of the tenth International Hydrographic Conference in 1972 recommended the formation of an ad hoc joint IMO/IHO Commission to study the "establishment of a co-ordinated, efficient global radio navigational warning service". Subsequently, this became a purely IHO Commission known as the Commission on Promulgation of Radio Navigational Warnings which nevertheless consulted continuously with IMO. In its report to the eleventh International Hydrographic Conference in 1977, the Commission submitted a Draft Plan for the Establishment of a World-Wide Navigational Warning System, also referred to as Plan for the Establishment of a Co-ordinated Radio Navigational Warning Service. The title World-Wide Navigational Warning Service or WWNWS used for this revised edition of the document reflects the evolution of the system from a proposed action to an effective co-ordinated service which now has all of its 16 NAVAREAs in operation. This revised edition contains changes necessitated by the advent of the global maritime distress and safety system (GMDSS), as adopted by the Conference of Contracting Governments to the International Convention for the Safety of Life at Sea, 1974, on the Global Maritime Distress and Safety System in November 1988, effective on 1 February 1992.

Future amendments to the guidance document will be considered formally and approved by IHO normally through the use of circular letters and by IMO through its Maritime Safety Committee in accordance with the procedures set out in annex 2 to this document. Proposed amendments will normally be evaluated by the IHO Commission on Promulgation of Radio Navigational Warnings, which includes as an ex-officio member a representative of the IMO Secretariat, prior to any extensive IHO or IMO consideration.

World-Wide navigational warning service

(WWNWS)

1 Introduction

1 Introduction

This document provides specific guidance for the promulgation of internationally co-ordinated NAVAREA and coastal warnings via HF MORSE (A1A), NAVTEX and international SafetyNET services. It includes the situation where international SafetyNET is used in lieu of NAVTEX as the primary means of transmitting coastal warnings. Its guidance does not apply to purely national warnings services which supplement those internationally co-ordinated services.

1 Introduction

1 - Introduction

This document provides specific guidance for the promulgation of internationally co-ordinated NAVAREA and coastal warnings via,NAVTEX and international SafetyNET services. It includes the situation where international SafetyNET is used in lieu of NAVTEX as the primary means of transmitting coastal warnings. Its guidance does not apply to purely national warnings services which supplement those internationally co-ordinated services.

1 Introduction

1 - Introduction

1.1 The purpose of this document is to provide specific guidance for the promulgation of internationally coordinated NAVAREA and coastal warnings. Its guidance does not apply to purely national warning services which supplement these internationally coordinated services.

1.2 The original resolution of the tenth International Hydrographic Conference in 1972 recommended the formation of an ad hoc joint IMO/IHO Commission to study the "establishment of a coordinated, efficient global radio navigational warning service". Subsequently, this became a purely IHO Commission known as the Commission on Promulgation of Radio Navigational Warnings, which nevertheless consulted continuously with IMO. In its report to the eleventh International Hydrographic Conference in 1977, the Commission submitted a Draft Plan for the Establishment of a World-Wide Navigational Warning System, also referred to as Plan for the Establishment of a coordinated Radio Navigational Warning Service. The title World-Wide Navigational Warning Service or WWNWS used for this revised edition of the document reflects the evolution of the system from a proposed action to an effective and fully operational coordinated service. This revised edition reflects the evolution of the WWNWS since the advent of the Global Maritime Distress and Safety System (GMDSS), as adopted by the Conference of Contracting Governments to the International Convention for the Safety of Life at Sea, 1974, on the Global Maritime Distress and Safety System in November 1988, effective on 1 February 1992.

1.3 Future amendments to this guidance document will be considered formally and approved by both IHO and IMO in accordance with the procedures set out in annex 2. Proposed amendments shall be evaluated by the IHO Commission on the Promulgation of Radio Navigational Warnings, which includes an ex-officio representative of the IMO Secretariat, prior to any extensive IHO or IMO consideration.

1 Introduction

1 - Introduction

1.1 The World-Wide Navigational Warning Service (WWNWS) is the internationally and nationally coordinated service for the promulgation of navigational warnings.

1.2 The purpose of this document is to provide specific guidance for the promulgation of internationally coordinated NAVAREA and coastal warnings. Its guidance does not apply to purely national warning services which supplement these internationally coordinated services.

1.3 The original resolution of the tenth International Hydrographic Conference in 1972 recommended the formation of an ad hoc joint IMO/IHO Commission to study the "establishment of a coordinated, efficient global radio navigational warning service". Subsequently, this became a purely IHO Commission known as the Commission on Promulgation of Radio Navigational Warnings, which in January 2009, became the IHO World Wide Navigational Warning Service Sub-Committee (WWNWS-SC) butnevertheless consults continuously with IMO. In its report to the eleventh International Hydrographic Conference in 1977, the Commission submitted a draft plan for the establishment of a World-Wide Navigational Warning System, also referred to as Plan for the Establishment of a coordinated Radio Navigational Warning Service. The title World-Wide Navigational Warning Service or WWNWS used for this revised edition of the document reflects the evolution of the system from a proposed action to an effective and fully operational coordinated service. This revised edition reflects the evolution of the WWNWS since the advent of the Global Maritime Distress and Safety System (GMDSS), as adopted by the Conference of Contracting Governments to the International Convention for the Safety of Life at Sea, 1974, on the Global Maritime Distress and Safety System in November 1988, effective on 1 February 1992.

1.4 Future amendments to this guidance document will be considered formally and approved by both IHO and IMO in accordance with the procedures set out in the annex. Proposed amendments must be evaluated by the IHO WWNWS-SC, which includes an ex-officio representative of the IMO Secretariat, prior to any extensive IHO or IMO consideration.

2 Definitions

2 - Definitions

2.1 For the purposes of this service, the following definitions apply:

2.1.1 Navigational warning - A broadcast message containing urgent information relevant to safe navigation. Types of information suitable for transmission as navigational warnings are described in 4.2.1.3.

2.1.2 Maritime safety information (MSI) - Navigational and meteorological warnings, meteorological forecasts and other urgent safety-related messages.

2.1.3 NAVAREA - A geographical sea area, as shown in the appendix established for the purpose of co-ordinating the transmission of radio navigational warnings. Where appropriate, the term NAVAREA followed by an identifying roman numeral may be used as a short title. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.4 Subarea - A subdivision of a NAVAREA in which a number of countries have established a co-ordinated system for the promulgation of coastal warnings. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.5 Region - The part of a NAVAREA or subarea established for the purpose of co-ordinating the transmission of coastal warnings by NAVTEX or international SafetyNET broadcast.

2.1.6 NAVAREA co-ordinator - The authority charged with co-ordinating, collating and issuing long-range navigational warnings and NAVAREA warnings bulletins to cover the whole of the NAVAREA.

2.1.7 Subarea co-ordinator - The authority charged with the co-ordination of navigational warnings information within a designated subarea.

2.1.8 National co-ordinator - The national authority charged with collating and issuing coastal warnings in a region.

2.1.9 NAVAREA warning - A navigational warning issued by the NAVAREA co-ordinator for the NAVAREA.

2.1.10 NAVAREA warnings bulletin - A list of serial numbers of those NAVAREA warnings in force issued and broadcast by the NAVAREA co-ordinator during at least the previous six weeks.

2.1.11 Coastal warning - A navigational warning promulgated by a national co-ordinator to cover a region. (Coastal warnings may also be broadcast by means other than those of the WWNWS as a national option.)

2.1.12 Local warning - A navigational warning which covers inshore waters, often within the limits of jurisdiction of a harbour or port authority.

2 Definitions

2 - Definitions

2.1 For the purposes of the WWNWS, the following definitions apply:

2.1.1 Coastal warning means a navigational warning promulgated as part of a numbered series by a National coordinator. Broadcast shall be made by the International NAVTEX service to defined NAVTEX service areas and/or by the International SafetyNET service to coastal warning areas. (In addition, Administrations may issue coastal warnings by other means.)

2.1.2 Coastal  warning  area means a unique and precisely defined sea area within a NAVAREA or Sub-Area established by a coastal State for the purpose of coordinating the broadcast of coastal maritime safety information through the SafetyNET service.

2.1.3 HF NBDP means High Frequency narrow-band direct-printing, using radio telegraphy as defined in Recommendation ITU-R M.688.

2.1.4 In-force bulletin means a list of serial numbers of those NAVAREA, Sub-Area or coastal warnings in force issued and broadcast by the NAVAREA coordinator, Sub-Area coordinator or National coordinator during at least the previous six weeks.

2.1.5 International  NAVTEX  service means the coordinated broadcast and automatic reception on 518 kHz of maritime safety information by means of narrow-band direct-printing telegraphy using the English language¹.

2.1.6  International SafetyNET service means the coordinated broadcasting and automated reception of maritime safety information via the Inmarsat Enhanced Group Call (EGC) system, using the English language, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.

2.1.7 Local warning means a navigational warning which covers inshore waters, often within the limits of jurisdiction of a harbour or port authority.

2.1.8 Maritime safety information (MSI)² means navigational and meteorological warnings, meteorological forecasts and other urgent safety-related messages broadcast to ships.

2.1.9 METAREA  means a geographical sea area³ established for the purpose of coordinating the broadcast of marine meteorological information. The term METAREA followed by a roman numeral may be used to identify a particular sea area. The delimitation of such areas is not related to and should not prejudice the delimitation of any boundaries between States.

2.1.10 National coordinator means the national authority charged with collating and issuing coastal warnings within a national area of responsibility.

2.1.11  National NAVTEX service means the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy using frequencies other than 518 kHz and languages as decided by the Administration concerned.

2.1.12  National SafetyNET service means the broadcasting and automated reception of maritime safety information via the Inmarsat EGC system, using languages as decided by the Administration concerned.

2.1.13 NAVAREA  means a  geographical sea area3 established for the purpose of coordinating the broadcast of navigational warnings. The term NAVAREA followed by a roman numeral may be used to identify a particular sea area. The delimitation of such areas is not related to and should not prejudice the delimitation of any boundaries between States.

2.1.14 NAVAREA coordinator means the authority charged with coordinating, collating and issuing NAVAREA warnings for a designated NAVAREA.

2.1.15 NAVAREA warning means a navigational warning or in-force bulletin promulgated as part of a numbered series by a NAVAREA coordinator.

2.1.16 Navigational warning means a message containing urgent information relevant to safe navigation broadcast to ships in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.

2.1.17 NAVTEX coordinator means the authority charged with operating and managing one or more NAVTEX stations broadcasting maritime safety information as part of the International NAVTEX service.

2.1.18 Sub-Area means a sub-division of a NAVAREA in which a number of countries have established a coordinated system for the promulgation of navigational warnings. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.19 Sub-Area coordinator means the authority charged with coordinating, collating and issuing Sub-Area warnings for a designated Sub-Area.

2.1.20 Sub-Area warning means a navigational warning promulgated as part of a numbered series by a Sub-Area coordinator. Broadcast shall be made by the International NAVTEX service to defined NAVTEX service areas or by the International SafetyNET service (through the appropriate NAVAREA coordinator).

2.1.21 In the operating procedures coordination means that the allocation of the time for data broadcast is centralized, the format and criteria of data transmissions are compliant as described in the Joint IMO/IHO/WMO Manual on Maritime Safety Information and that all services are managed as set out in resolutions A.705(17), as amended and A.706(17), as amended.

 

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¹ As set out in the IMO NAVTEX Manual.
² As defined in regulation IV/2 of the 1974 SOLAS Convention, as amended.
³ Which may include inland seas, lakes and waterways navigable by sea-going ships.

2 Definitions

2 - Definitions

2.1 For the purposes of the WWNWS, the following definitions apply:

2.1.1 Coastal warning means a navigational warning or in-force bulletin promulgated as part of a numbered series by a National Coordinator. Broadcast should be made by the International NAVTEX service to defined NAVTEX service areas and/or by the International SafetyNET service to coastal warning areas. (In addition, Administrations may issue coastal warnings by other means.)

2.1.2 Coastal warning area means a unique and precisely defined sea area within a NAVAREA/METAREA or Sub-area established by a coastal State for the purpose of coordinating the broadcast of coastal maritime safety information through the SafetyNET service.

2.1.3 Global Maritime Distress and Safety System (GMDSS) means the global communications service based upon automated systems, both satellite and terrestrial, to provide distress alerting and promulgation of maritime safety information for mariners.

2.1.4 HF NBDP means High Frequency narrow-band direct-printing, using radio telegraphy as defined in Recommendation ITU-R M.688, as amended.

2.1.5 In-force bulletin means a list of serial numbers of those NAVAREA, Sub-area or coastal warnings in force issued and broadcast by the NAVAREA Coordinator, Sub-area Coordinator or National Coordinator.

2.1.6 International NAVTEX service means the coordinated broadcast and automatic reception on 518 kHz of maritime safety information by means of narrow-band direct-printing telegraphy using the English language¹.

2.1.7 International SafetyNET service means the coordinated broadcast and automatic reception of maritime safety information via the Inmarsat Enhanced Group Call (EGC) system, using the English language, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.

2.1.8 Local warning means a navigational warning which covers inshore waters, often within the limits of jurisdiction of a harbour or port authority.

2.1.9 Maritime safety information (MSI)² means navigational and meteorological warnings, meteorological forecasts and other urgent safety-related messages broadcast to ships.

2.1.10 Maritime safety information service means the internationally and nationally coordinated network of broadcasts containing information which is necessary for safe navigation.

2.1.11 METAREA means a geographical sea area³ established for the purpose of coordinating the broadcast of marine meteorological information. The term METAREA followed by a roman numeral may be used to identify a particular sea area. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.12 National Coordinator means the national authority charged with collating and issuing coastal warnings within a national area of responsibility.

2.1.13 National NAVTEX service means the broadcast and automatic reception of maritime safety information by means of narrow-band direct-printing telegraphy using frequencies other than 518 kHz and languages as decided by the Administration concerned.

2.1.14 National SafetyNET service means the broadcast and automatic reception of maritime safety information via the Inmarsat EGC system, using languages as decided by the Administration concerned.

2.1.15 NAVAREA means a geographical sea area3 established for the purpose of coordinating the broadcast of navigational warnings. The term NAVAREA followed by a roman numeral may be used to identify a particular sea area. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.16 NAVAREA Coordinator means the authority charged with coordinating, collating and issuing NAVAREA warnings for a designated NAVAREA.

2.1.17 NAVAREA warning means a navigational warning or in-force bulletin promulgated as part of a numbered series by a NAVAREA Coordinator.

2.1.18 Navigational warning means a message containing urgent information relevant to safe navigation broadcast to ships in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.

2.1.19 NAVTEX means the system for the broadcast and automatic reception of maritime safety information by means of narrow band direct-printing telegraphy.

2.1.20 NAVTEX Coordinator means the authority charged with operating and managing one or more NAVTEX stations broadcasting maritime safety information as part of the International NAVTEX service.

2.1.21 NAVTEX coverage area means an area defined by an arc of a circle having a radius from the transmitter calculated according to the method and criteria given in IMO resolution A.801(19), annex 4.

2.1.22 NAVTEX service area means a unique and precisely defined sea area, wholly contained within the NAVTEX coverage area, for which maritime safety information is provided from a particular NAVTEX transmitter. It is normally defined by a line that takes full account of local propagation conditions and the character and volume of information and maritime traffic patterns in the region, as given in resolution A.801(19), annex 4.

2.1.23 Other urgent safety-related information means maritime safety information broadcast to ships that is not defined as a navigational warning or meteorological information. This may include, but is not limited to, significant malfunctions or changes to maritime communications systems, and new or amended mandatory ship reporting systems or maritime regulations affecting ships at sea.

2.1.24 SafetyNET means the international service for the broadcast and automatic reception of maritime safety information via the Inmarsat EGC system. SafetyNET receiving capability is part of the mandatory equipment which is required to be carried by certain ships in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.

2.1.25 Sub-area means a subdivision of a NAVAREA/METAREA in which a number of countries have established a coordinated system for the promulgation of navigational warnings. The delimitation of such areas is not related to and shall not prejudice the delimitation of any boundaries between States.

2.1.26 Sub-area Coordinator means the authority charged with coordinating, collating and issuing Sub-area warnings for a designated Sub-area.

2.1.27 Sub-area warning means a navigational warning or in-force bulletin promulgated as part of a numbered series by a Sub-area Coordinator. Broadcast should be made by the International NAVTEX service to defined NAVTEX service areas or by the International SafetyNET service (through the appropriate NAVAREA Coordinator).

2.1.28 User defined area means a temporary geographic area, either circular or rectangular, to which maritime safety information is addressed.

2.1.29 In the operating procedures coordination means that the allocation of the time for data broadcast is centralized, the format and criteria of data transmissions are compliant as described in the Joint IMO/IHO/WMO Manual on Maritime Safety Information and that all services are managed as set out in resolutions A.705(17), as amended, A.706(17), as amended and A.1051(27).

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¹ As set out in the IMO NAVTEX Manual.
² As defined in regulation IV/2 of the 1974 SOLAS Convention, as amended.
³ Which may include inland seas, lakes and waterways navigable by seagoing ships.

3 Broadcast systems

3.1 Broadcast systems

3.1.1 The radio systems to be used internationally for the promulgation of maritime safety information are laid down in the International Convention for the Safety of Life at Sea, 1974 (SOLAS), as amended. These include:

1. NAVTEX - Single frequency time-shared broadcast system with automated reception and message rejection/selection facilities. Use of NAVTEX is regulated by the IMO NAVTEX Manual (IMO publication 951).
   
   
2. international (enhanced group call) SafetyNET service -Dedicated satellite broadcast system with automated reception and message rejection/selection facilities. Use of this service is regulated by the International SafetyNET Manual (IMO publication 908).¹
   
   
3. HF morse (A1A) - Traditional manually operated radiotelegraphy system. To be superseded by the automated systems in .1 and .2 above on introduction of the GMDSS between 1992 and 1999.
   

3.2 Broadcast scheduling

3.2.1 Automated systems (SafetyNET/NAVTEX)

3.2.1.1 Navigational warnings should be transmitted as soon as possible or as dictated by the nature and timing of the event. Normally, the initial broadcast should be made as follows:

1. for SafetyNET, within 30 minutes of receipt of original information;
   
   
2. for NAVTEX, at the next scheduled broadcast, unless circumstances indicate the use of procedures for VITAL or IMPORTANT warnings.
   

3.2.1.2 Navigational warnings should be repeated in scheduled broadcasts in accordance with the guidelines promulgated in the following documents, as appropriate:

1. International SafetyNET Manual.¹
   
   
2. NAVTEX Manual (IMO publication 951).
   

3.2.2 Manual system (HF A1A)

3.2.2.1 NAVAREA warnings should be transmitted at scheduled times. They should be repeated in the broadcast immediately following the original transmission and thereafter at least every four days for six weeks unless previously cancelled.

3.2.2.2 At least two daily transmission times are necessary to provide adequate promulgation of NAVAREA warnings. When NAVAREAs may extend across more than six time zones, more than two broadcasts should be especially considered to ensure that warnings can be received.

3.2.3 Schedule changes

3.2.3.1 NAVAREA co-ordinators should ensure that the times of HF broadcasting do not coincide with those in adjacent NAVAREAs. Times of scheduled broadcasts under the international SafetyNET service should be co-ordinated through the International SafetyNET Co-ordinating Panel.

3.2.3.2 Changes to broadcast schedules should be implemented only after the International Telecommunication Union (ITU) has been given at least three months' notice by the appropriate national authority, unless urgent operational considerations dictate more immediate action.

3.2.3.3 IMO and IHO should be informed of intended changes at the same time as they are communicated to ITU.

3.2.3.4 Arrangements should be made for informing mariners in good time of all changes.

 

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¹ Refer to COM/Circ.102./Rev.1, as it may be amended.

3 Broadcast systems

3.1 Broadcast systems

3.1.1 The radio systems to be used internationally for the promulgation of maritime safety information are laid down in the International Convention for the Safety of Life at Sea, 1974 (SOLAS), as amended. These include:

1. NAVTEX - Single frequency time-shared broadcast system with automated reception and message rejection/selection facilities. Use of NAVTEX is regulated by the IMO NAVTEX Manual (IMO publication 951).
   
   
2. international (enhanced group call) SafetyNET service -Dedicated satellite broadcast system with automated reception and message rejection/selection facilities. Use of this service is regulated by the International SafetyNET Manual (IMO publication 908).¹
   
     

3.2 Broadcast scheduling

3.2.1 Automated systems (SafetyNET/NAVTEX)

3.2.1.1 Navigational warnings should be transmitted as soon as possible or as dictated by the nature and timing of the event. Normally, the initial broadcast should be made as follows:

1. for SafetyNET, within 30 minutes of receipt of original information;
   
   
2. for NAVTEX, at the next scheduled broadcast, unless circumstances indicate the use of procedures for VITAL or IMPORTANT warnings.
   

3.2.1.2 Navigational warnings should be repeated in scheduled broadcasts in accordance with the guidelines promulgated in the following documents, as appropriate:

1. International SafetyNET Manual.¹
   
   
2. NAVTEX Manual (IMO publication 951).
   

   

3.2.1.3 At least two daily transmission times are necessary to provide adequate promulgation of NAVAREA warnings. When NAVAREAs may extend across more than six time zones, more than two broadcasts should be especially considered to ensure that warnings can be received.

3.2.2 Schedule changes

3.2.2.1 NAVAREA co-ordinators should ensure that the times of HF broadcasting do not coincide with those in adjacent NAVAREAs. Times of scheduled broadcasts under the international SafetyNET service should be co-ordinated through the International SafetyNET Co-ordinating Panel.

3.2.2.2 Changes to broadcast schedules should be implemented only after the International Telecommunication Union (ITU) has been given at least three months' notice by the appropriate national authority, unless urgent operational considerations dictate more immediate action.

3.2.2.3 IMO and IHO should be informed of intended changes at the same time as they are communicated to ITU.

3.2.2.4 Arrangements should be made for informing mariners in good time of all changes.

 

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¹ Refer to COM/Circ.102./Rev.1, as it may be amended.

3 Navigational warning broadcasts

3 - Navigational warning broadcasts

3.1  Methods

3.1.1 Two principal methods are used for broadcasting navigational warnings as part of MSI in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended, in the areas covered by these methods, as follows:

1. NAVTEX: broadcasts to coastal waters; and
   
   
2. SafetyNET: broadcasts which cover all the waters of the globe except for sea area A4, as defined by resolution A.801(19), Annex 3, paragraph 4, as amended.
   
   

3.1.2 Information shall be provided for unique and precisely defined sea areas, each being served only by the most appropriate of the above systems. Although there will be some duplication to allow a ship to change from one system to another, the majority of messages will only be broadcast on one system.

3.1.3 NAVTEX broadcasts shall be made in accordance with the standards and procedures set out in the NAVTEX Manual.

3.1.4 SafetyNET broadcasts shall be made in accordance with the standards and procedures set out in the International SafetyNET Manual.

3.1.5 HF NBDP may be used to promulgate maritime safety information in areas outside Inmarsat coverage (SOLAS regulation IV/7.1.5).

3.1.6 In addition, Administrations may also provide navigational warnings by other means.

 

3.2 Scheduling

3.2.1 Automated methods (NAVTEX /SafetyNET)

3.2.1.1 Navigational warnings shall be broadcast as soon as possible or as dictated by the nature and timing of the event. Normally, the initial broadcast should be made as follows:

1. for NAVTEX, at the next scheduled broadcast, unless circumstances indicate the use of procedures for VITAL or IMPORTANT warnings; and
   
   
2. for SafetyNET, within 30 min of receipt of original information, or at the next scheduled broadcast.
   
   

3.2.1.2 Navigational warnings shall be repeated in scheduled broadcasts in accordance with the guidelines promulgated in the NAVTEX Manual and International SafetyNET Manual as appropriate.

3.2.1.3 At least two scheduled daily broadcast times are necessary to provide adequate promulgation of NAVAREA warnings. When NAVAREAs extend across more than six time zones, more than two broadcasts should be considered to ensure that warnings can be received. When using SafetyNET in lieu of NAVTEX for coastal warnings, Administrations may need to consider an increase in the number of scheduled daily broadcasts compared with the requirement for NAVAREA warnings.

3.2.2  Schedule changes

3.2.2.1 Broadcast times for NAVTEX are defined by the B1 character of the station, allocated by the coordinating Panel on NAVTEX Services of the Sub-Committee on Radiocommunications and Search and Rescue.

3.2.2.2 Times of scheduled broadcasts under the international SafetyNET service are coordinated through the International SafetyNET coordinating Panel.

3 Navigational warning broadcasts

3 - Navigational warning broadcasts

3.1 Methods

3.1.1 Two principal methods are used for broadcasting navigational warnings as part of MSI in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended, in the areas covered by these methods, as follows:

1. NAVTEX: broadcasts to coastal waters; and
   
   
2. SafetyNET: broadcasts which cover all the waters of the globe except for sea area A4, as defined by resolution A.801(19), annex 3, as amended.
   
   

3.1.2 Information should be provided for unique and precisely defined sea areas, each being served only by the most appropriate of the above methods. Although there will be some duplication to allow a ship to change from one method to another, the majority of warnings will be broadcast either on NAVTEX or SafetyNET.

3.1.3 NAVTEX broadcasts should be made in accordance with the standards and procedures set out in the NAVTEX Manual.

3.1.4 SafetyNET broadcasts should be made in accordance with the standards and procedures set out in the International SafetyNET Manual.

3.1.5 HF NBDP may be used to promulgate maritime safety information in areas outside Inmarsat coverage (SOLAS regulation IV/7.1.5).

3.1.6 In addition, Administrations may also provide navigational warnings by other means.

3.1.7 In the event of failure of normal transmission facilities, an alternative means of transmission should be utilized. A NAVAREA Warning and a coastal Warning, if possible, should be issued detailing the failure, its duration and, if known, the alternative route for the dissemination of MSI.

 

3.2 Scheduling

3.2.1 Automated methods (NAVTEX/SafetyNET)

3.2.1.1 Navigational warnings should be broadcast as soon as possible or as dictated by the nature and timing of the event. Normally, the initial broadcast should be made as follows:

1. for NAVTEX, at the next scheduled broadcast, unless circumstances indicate the use of procedures for VITAL or IMPORTANT warnings; and
   
   
2. for SafetyNET, within 30 minutes of receipt of original information, or at the next scheduled broadcast.
   
   

3.2.1.2 Navigational warnings should be repeated in scheduled broadcasts in accordance with the guidelines promulgated in the NAVTEX Manual and International SafetyNET Manual, as appropriate.

3.2.1.3 At least two scheduled daily broadcast times are necessary to provide adequate promulgation of NAVAREA warnings. When NAVAREAs extend across more than six time zones, more than two broadcasts should be considered to ensure that warnings can be received. When using SafetyNET in lieu of NAVTEX for coastal warnings, Administrations may need to consider an increase in the number of scheduled daily broadcasts compared with the requirement for NAVAREA warnings.

3.2.2 Schedule changes

3.2.2.1 Broadcast times for NAVTEX are defined by the B1 transmitter identification character of the station, allocated by the IMO NAVTEX Coordinating Panel.

3.2.2.2 Times of scheduled broadcasts under the international SafetyNET service are coordinated through the International SafetyNET Coordinating Panel.

4 Navigational warnings

4.1 General

4.1.1 There are three types of navigational warnings: NAVAREA warnings, coastal warnings and local warnings. The WWNWS guidance and co-ordination are involved with only two of them: NAVAREA warnings and coastal warnings; of the latter, only with those coastal warnings which are broadcast under the internationally co-ordinated services using NAVTEX, or in lieu of NAVTEX, international SafetyNET service, as their primary means of transmission.

4.1.2 Navigational warnings should normally refer only to the area concerned.

4.1.3 Navigational warnings should be broadcast for as long as the information is valid or until it is made available by other means.

4.1.4 Navigational warnings should remain in force until cancelled by the originating co-ordinator.

4.1.5 The duration of a navigational warning should be given in the text, if known.

4.2 The three types of navigational warnings are:

4.2.1 NAVAREA warnings

4.2.1.1 Generally speaking, NAVAREA warnings are concerned with the information detailed below which ocean-going mariners require for their safe navigation. This includes, in particular, failures of important aids to navigation, as well as information which may require changes to planned navigational routes.

4.2.1.2 Warnings for coastal areas may be provided by NAVTEX or the international SafetyNET service, when implemented in lieu of NAVTEX. From the date a NAVTEX receiver is mandatory on all ships sailing in areas of NAVTEX service (1 August 1993), it is intended that such information not be rebroadcast as a NAVAREA warning unless it is deemed of such significance that the mariner should be aware of it before entering the area of NAVTEX coverage. The national co-ordinator will evaluate the significance of the information for consideration as a NAVAREA warning while the NAVAREA co-ordinator will make the final determination (see 6.6.7 and 6.2.3 respectively).

4.2.1.3 The following subject areas are considered suitable for transmission as NAVAREA warnings. This list is not exhaustive and should be regarded only as a guideline. Furthermore, it presupposes that sufficiently precise information about the item has not previously been disseminated in a notice to mariners:

1. casualties to lights, fog signals and buoys affecting main shipping lanes;
   
   
2. the presence of dangerous wrecks in or near main shipping lanes and, if relevant, their marking;
   
   
3. establishment of major new aids to navigation or significant changes to existing ones when such establishment or change might be misleading to shipping;
   
   
4. the presence of large unwieldy tows in congested waters;
   
   
5. drifting mines;
   
   
6. areas where search and rescue (SAR) and anti-pollution operations are being carried out (for avoidance of such areas);
   
   
7. at the request of the controlling MRCC, notification of ships and aircraft on or over the open sea reported in distress, seriously overdue or missing;
   
   
8. the presence of newly discovered rocks, shoals, reefs and wrecks likely to constitute a danger to shipping, and, if relevant, their marking;
   
   
9. unexpected alteration or suspension of established routes;
   
   
10. cable- or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes;
    
    
11. establishment of offshore structures in or near shipping lanes;
    
    
12. significant malfunctioning of radio navigation services and shore-based maritime safety information radio or satellite service;
    
    
13. information concerning special operations which might affect the safety of shipping, sometimes over wide areas, e.g. naval exercises, missile firings, space missions, nuclear tests, etc. It is important that where the degree of hazard is known, this information is included in the relevant warning. Whenever possible, such warnings should be originated not less than five days in advance of the scheduled event. The warning should remain in force until the event is completed.¹
    

4.2.1.4 NAVAREA warnings bulletins should be transmitted not less than once per week at a regularly scheduled time.

4.2.1.5 Arrangements should be made for the text of NAVAREA warnings in force to be available at port offices and, where appropriate, for their eventual inclusion in a generally available printed form.

4.2.2 Coastal warnings

4.2.2.1 Coastal warnings promulgate information which is necessary for safe navigation within a given region. Coastal warnings should normally provide sufficient information for safe navigation to seaward of the fairway buoy or pilot station and should not be restricted to main shipping lanes. Where the region is served by NAVTEX, it should provide navigational warnings for the entire IMO-approved service area of the NAVTEX transmitter. Where the region is not served by NAVTEX, it is desirable to include all warnings relevant to the coastal waters up to 250 miles from the coast in the international SafetyNET service transmission.

4.2.2.2 Coastal warnings should include, at a minimum, the types of information required for NAVAREA warnings in 4.2.1.3.

4.2.3 Local warnings

4.2.3.1 Local warnings supplement coastal warnings by giving detailed information within inshore waters including the limits of a harbour or port authority on aspects which the ocean-going ship normally does not require.

 

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¹ The Maritime Safety Committee is authorized to review the provisions of this paragraph and, if appropriate, to provide for exemptions from this requirement, under special circumstances.

4 Navigational warnings

4.1 General

4.1.1 There are three types of navigational warnings: NAVAREA warnings, coastal warnings and local warnings. The WWNWS guidance and co-ordination are involved with only two of them: NAVAREA warnings and coastal warnings; of the latter, only with those coastal warnings which are broadcast under the internationally co-ordinated services using NAVTEX, or in lieu of NAVTEX, international SafetyNET service, as their primary means of transmission.

4.1.2 Navigational warnings should normally refer only to the area concerned.

4.1.3 Navigational warnings should be broadcast for as long as the information is valid or until it is made available by other means.

4.1.4 Navigational warnings should remain in force until cancelled by the originating co-ordinator.

4.1.5 The duration of a navigational warning should be given in the text, if known.

4.2 The three types of navigational warnings are:

4.2.1 NAVAREA warnings

4.2.1.1 Generally speaking, NAVAREA warnings are concerned with the information detailed below which ocean-going mariners require for their safe navigation. This includes, in particular, failures of important aids to navigation, as well as information which may require changes to planned navigational routes.

4.2.1.2 Warnings for coastal areas may be provided by NAVTEX or the international SafetyNET service, when implemented in lieu of NAVTEX. From the date a NAVTEX receiver is mandatory on all ships sailing in areas of NAVTEX service (1 August 1993), it is intended that such information not be rebroadcast as a NAVAREA warning unless it is deemed of such significance that the mariner should be aware of it before entering the area of NAVTEX coverage. The national co-ordinator will evaluate the significance of the information for consideration as a NAVAREA warning while the NAVAREA co-ordinator will make the final determination (see 6.6.7 and 6.2.3 respectively).

4.2.1.3 The following subject areas are considered suitable for transmission as NAVAREA warnings. This list is not exhaustive and should be regarded only as a guideline. Furthermore, it presupposes that sufficiently precise information about the item has not previously been disseminated in a notice to mariners:

1. casualties to lights, fog signals and buoys affecting main shipping lanes;
   
   
2. the presence of dangerous wrecks in or near main shipping lanes and, if relevant, their marking;
   
   
3. establishment of major new aids to navigation or significant changes to existing ones when such establishment or change might be misleading to shipping;
   
   
4. the presence of large unwieldy tows in congested waters;
   
   
5. drifting mines;
   
   
6. areas where search and rescue (SAR) and anti-pollution operations are being carried out (for avoidance of such areas);
   
   
7. the presence of newly discovered rocks, shoals, reefs and wrecks likely to constitute a danger to shipping, and, if relevant, their marking;
   
   
8. unexpected alteration or suspension of established routes;
   
   
9. cable- or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes;
   
   
10. establishment of offshore structures in or near shipping lanes;
    
    
11. significant malfunctioning of radio navigation services and shore-based maritime safety information radio or satellite service;
    
    
12. information concerning special operations which might affect the safety of shipping, sometimes over wide areas, e.g. naval exercises, missile firings, space missions, nuclear tests, etc. It is important that where the degree of hazard is known, this information is included in the relevant warning. Whenever possible, such warnings should be originated not less than five days in advance of the scheduled event. The warning should remain in force until the event is completed.¹
    

4.2.1.4 NAVAREA warnings bulletins should be transmitted not less than once per week at a regularly scheduled time.

4.2.1.5 Arrangements should be made for the text of NAVAREA warnings in force to be available at port offices and, where appropriate, for their eventual inclusion in a generally available printed form.

4.2.2 Coastal warnings

4.2.2.1 Coastal warnings promulgate information which is necessary for safe navigation within a given region. Coastal warnings should normally provide sufficient information for safe navigation to seaward of the fairway buoy or pilot station and should not be restricted to main shipping lanes. Where the region is served by NAVTEX, it should provide navigational warnings for the entire IMO-approved service area of the NAVTEX transmitter. Where the region is not served by NAVTEX, it is necessary to include all warnings relevant to the coastal waters up to 250 miles from the coast in the international SafetyNET service transmission.

4.2.2.2 Coastal warnings should include, at a minimum, the types of information required for NAVAREA warnings in 4.2.1.3.

4.2.3 Local warnings

4.2.3.1 Local warnings supplement coastal warnings by giving detailed information within inshore waters including the limits of a harbour or port authority on aspects which the ocean-going ship normally does not require.

 

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¹ The Maritime Safety Committee is authorized to review the provisions of this paragraph and, if appropriate, to provide for exemptions from this requirement, under special circumstances.

4 Navigational warnings

4 - Navigational warnings

4.1  General

4.1.1 There are four types of navigational warnings: NAVAREA warnings, Sub-Area warnings, coastal warnings and local warnings. The WWNWS guidance and coordination are involved with only three of them:

1. NAVAREA warnings;
   
   
2. Sub-Area warnings; and
   
   
3. coastal warnings.
   
   

4.1.2  Navigational warnings shall remain in force until cancelled by the originating coordinator. Navigational warnings should be broadcast for as long as the information is valid; however, if they are readily available to mariners by other official means, for example in Notices to Mariners, then after a period of six weeks they may no longer be broadcast.

4.1.3  The minimum information in a navigational warning which a mariner requires is "hazard" and "position". It is usual, however, to include sufficient extra detail to allow some freedom of action in the vicinity of the hazard. This means that the message should give enough extra data for the mariner to be able to recognize the hazard and assess its effect upon his navigation.

4.1.4 If known, the duration of the event causing a navigational warning should be given in the text.

4.1.5 Some of the subjects for navigational warnings listed in paragraph 4.2.1.3 (e.g., drifting ice, tsunami warnings, negative tidal surges) may also be suitable for promulgation as METAREA forecasts or warnings. In this event, appropriate coordination between the relevant NAVAREA coordinator and METAREA issuing Service must occur.

 

4.2  The four types of navigational warnings are:

4.2.1 NAVAREA warnings

4.2.1.1 NAVAREA warnings are concerned with the information detailed below which ocean-going mariners require for their safe navigation. This includes, in particular, new navigational hazards and failures of important aids to navigation as well as information which may require changes to planned navigational routes.

4.2.1.2  Coastal warnings are broadcast by the International NAVTEX service, or by the International SafetyNET service when implemented in lieu of NAVTEX. They are not normally rebroadcast as NAVAREA warnings unless deemed of such significance that the mariner should be aware of them before entering a NAVTEX service area. The National coordinator will evaluate the significance of the information for consideration as a NAVAREA warning while the NAVAREA coordinator will make the final determination.

4.2.1.3 The following subjects are considered suitable for broadcast as NAVAREA warnings. This list is not exhaustive and should be regarded only as a guideline. Furthermore, it pre-supposes that sufficiently precise information about the item has not previously been disseminated in a Notice to Mariners:

1. casualties to lights, fog signals, buoys and other aids to navigation affecting main shipping lanes;
   
   
2. the presence of dangerous wrecks in or near main shipping lanes and, if relevant, their marking;
   
   
3. establishment of major new aids to navigation or significant changes to existing ones when such establishment or change, might be misleading to shipping;
   
   
4. the presence of large unwieldy tows in congested waters;
   
   
5. drifting hazards (including derelict ships, ice, mines, containers, other large items, etc.);
   
   
6. areas where search and rescue (SAR) and anti-pollution operations are being carried out (for avoidance of such areas);
   
   
7. the presence of newly discovered rocks, shoals, reefs and wrecks likely to constitute a danger to shipping, and, if relevant, their marking;
   
   
8. unexpected alteration or suspension of established routes;
   
   
9. cable or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes;
   
   
10. the establishment of research or scientific instruments in or near shipping lanes;
    
    
11. the establishment of offshore structures in or near shipping lanes;
    
    
12. significant malfunctioning of radio-navigation services and shore-based maritime safety information radio or satellite services;
    
    
13. information concerning special operations which might affect the safety of shipping, sometimes over wide areas, e.g., naval exercises, missile firings, space missions, nuclear tests, ordnance dumping zones, etc. It is important that where the degree of hazard is known, this information is included in the relevant warning. Whenever possible such warnings should be originated not less than five days in advance of the scheduled event and reference may be made to relevant national publications in the warning;
    
    
14. acts of piracy and armed robbery against ships;
    
    
15. tsunamis and other natural phenomena, such as abnormal changes to sea level;
    
    
16. World Health Organization (WHO) health advisory information; and
    
    
17. security related requirements¹.
    
    

4.2.2  Sub-Area warnings

4.2.2.1 Sub-Area warnings broadcast information which is necessary for safe navigation within a Sub-Area. They will normally include all subjects listed in 4.2.1.3 above, but will usually affect only the Sub-Area.

 

4.2.3 Coastal warnings

4.2.3.1 Coastal warnings broadcast information which is necessary for safe navigation within areas seaward of the fairway buoy or pilot station, and should not be restricted to main shipping lanes. Where the area is served by NAVTEX, it should provide navigational warnings for the entire NAVTEX service area. Where the area is not served by NAVTEX, it is necessary to include all warnings relevant to the coastal waters up to 250 miles from the coast in the International SafetyNET service broadcast.

4.2.3.2 Coastal warnings should include at least the subjects in 4.2.1.3.

 

4.2.4 Local warnings

4.2.4.1 Local warnings broadcast information which cover inshore waters, often within the limits of jurisdiction of a harbour or port authority. They are broadcast by means other than NAVTEX or SafetyNET, and supplement coastal warnings by giving detailed information within inshore waters.

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¹ In accordance with the requirements of the International Ship and Port Facility Security Code.

4 Navigational warnings

4 Navigational warnings

4.1 General

4.1.1 There are four types of navigational warnings: NAVAREA warnings, Sub-area warnings, coastal warnings and local warnings. The WWNWS guidance and coordination are involved with only three of them:

1. NAVAREA warnings;
   
   
2. Sub-area warnings; and
   
   
3. Coastal warnings.
   
   

4.1.2 Navigational warnings should remain in force until cancelled by the originating coordinator. Navigational warnings should be broadcast for as long as the information is valid; however, if they are readily available to mariners by other official means, for example in Notices to Mariners, then after a period of six weeks they may no longer be broadcast.

4.1.3 The minimum information in a navigational warning which a mariner requires is "hazard" and "position". It is usual, however, to include sufficient extra detail to allow some freedom of action in the vicinity of the hazard. This means that the message should give enough extra data for the mariners to be able to recognize the hazard and assess its effect upon their navigation.

4.1.4 If known, the duration of the event causing a navigational warning should be given in the text.

4.1.5 Some of the subjects for navigational warnings listed in paragraph 4.2.1.3 (e.g. drifting ice and tsunami warnings) may also be suitable for inclusion in METAREA forecasts or warnings. In this event, appropriate coordination between the relevant NAVAREA and METAREA Coordinators must occur.

 

4.2 The four types of navigational warnings are:

4.2.1 NAVAREA warnings

4.2.1.1 NAVAREA warnings are concerned with the information detailed below which oceangoing mariners require for their safe navigation. This includes, in particular, new navigational hazards and failures of important aids to navigation as well as information which may require changes to planned navigational routes.

4.2.1.2 Coastal warnings are broadcast by the International NAVTEX service, or by the International SafetyNET service when implemented in lieu of NAVTEX. They are not normally rebroadcast as NAVAREA warnings unless deemed of such significance that the mariner should be aware of them before entering a NAVTEX service area. The National Coordinator will evaluate the significance of the information for consideration as a NAVAREA warning while the NAVAREA Coordinator will make the final determination.

4.2.1.3 The following subjects are considered suitable for broadcast as NAVAREA warnings. This list is not exhaustive and should be regarded only as a guideline. Furthermore, it presupposes that sufficiently precise information about the item has not previously been disseminated in a Notice to Mariners:

1. casualties to lights, fog signals, buoys and other aids to navigation affecting main shipping lanes;
   
   
2. the presence of dangerous wrecks in or near main shipping lanes and, if relevant, their marking;
   
   
3. establishment of major new aids to navigation or significant changes to existing ones, when such establishment or change might be misleading to shipping;
   
   
4. the presence of large unwieldy tows in congested waters;
   
   
5. drifting hazards (including derelict ships, ice, mines, containers, other large items over 6 metres in length, etc.);
   
   
6. areas where search and rescue (SAR) and anti-pollution operations are being carried out (for avoidance of such areas);
   
   
7. the presence of newly discovered rocks, shoals, reefs and wrecks likely to constitute a danger to shipping, and, if relevant, their marking;
   
   
8. unexpected alteration or suspension of established routes;
   
   
9. cable or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes;
   
   
10. the establishment of research or scientific instruments in or near shipping lanes;
    
    
11. the establishment of offshore structures in or near shipping lanes;
    
    
12. significant malfunctioning of radionavigation services and shore-based maritime safety information radio or satellite services;
    
    
13. information concerning events which might affect the safety of shipping, sometimes over wide areas, e.g. naval exercises, missile firings, space missions, nuclear tests, ordnance dumping zones, etc. It is important that where the degree of hazard is known, this information is included in the relevant warning. Whenever possible such warnings should be originated not less than five days in advance of the scheduled event and reference may be made to relevant national publications in the warning;
    
    
14. acts of piracy and armed robbery against ships;
    
    
15. tsunamis and other natural phenomena, such as abnormal changes to sea level;
    
    
16. World Health Organization (WHO) health advisory information; and
    
    
17. security-related requirements¹.
    
    

4.2.2 Sub-area warnings

4.2.2.1 Sub-area warnings broadcast information which is necessary for safe navigation within a Sub-area. They will normally include all subjects listed in 4.2.1.3 above, but will usually affect only the Sub-area.

 

4.2.3 Coastal warnings

4.2.3.1 Coastal warnings broadcast information which is necessary for safe navigation within areas seaward of the fairway buoy or pilot station, and should not be restricted to main shipping lanes. Where the area is served by NAVTEX, it should provide navigational warnings for the entire NAVTEX service area. Where the area is not served by NAVTEX, it is necessary to include all warnings relevant to the coastal waters up to 250 miles from the coast in the International SafetyNET service broadcast.

4.2.3.2 Coastal warnings should include at least the subjects in 4.2.1.3.

 

4.2.4 Local warnings

4.2.4.1 Local warnings broadcast information which cover inshore waters, often within the limits of jurisdiction of a harbour or port authority. They are broadcast by means other than NAVTEX or SafetyNET, and supplement coastal warnings by giving detailed information within inshore waters.

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¹ In accordance with the requirements of the International Ship and Port Facility Security Code.

5 Information control

5.1 Message numbering

5.1.1 Navigational warnings in each series should be consecutively numbered throughout the calendar year, commencing with 0001 at 0000 UTC on 01 January.

5.1.2 Navigational warnings should, as a general rule, be transmitted in reverse numerical order on scheduled broadcasts.

5.1.3 At the beginning of every navigational warning scheduled broadcast for which there are no warnings to be disseminated, a brief message should be transmitted to identify the broadcast and advise the mariner that there is no navigational warning message traffic on hand.

5.2 Priority message handling

5.2.1 The guidelines for the handling of navigational warnings are promulgated, as appropriate, in the following documents:
.1 International SafetyNET Manual;*
.2 NAVTEX Manual (IMO publication no. IMO-951E).

5.3 Language

5.3.1 All NAVAREA and coastal warnings must be transmitted in English in the internationally co-ordinated services.

5.3.2 In addition, NAVAREA warnings may be broadcast in one or more of the official languages of the United Nations.

5.3.3 Coastal warnings may also be broadcast in the national language, and local warnings may be issued only in the national language as a national service.

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* Refer to COM/Circ.102./Rev.1, as it may be amended.

5 Message requirements

5 - Message requirements

5.1 Guidance

5.1.1 Operational guidance for handling and formatting navigational warnings is given in the Joint IMO/IHO/WMO Manual on Maritime Safety Information, the NAVTEX Manual and the International SafetyNET Manual.

 

5.2 Numbering

5.2.1 Navigational warnings in each series shall be consecutively numbered throughout the calendar year, commencing with 0001 at 0000 UTC on 1 January.

5.2.2 Navigational warnings should, as a general rule, be transmitted in reverse numerical order on scheduled broadcasts.

 

5.3 Language

5.3.1 All NAVAREA, Sub-Area and coastal warnings shall be broadcast only in English in the International NAVTEX and SafetyNET services.

5.3.2  In addition to the required broadcasts in English, NAVAREA, Sub-Area and coastal warnings may be broadcast in a national language using national NAVTEX and SafetyNET services and/or other means.

5.3.3  Local warnings may be issued in the national language and/or in English.

 

5.4 "No warnings" message

5.4.1 When there are no navigational warnings to be disseminated at a scheduled broadcast time, a brief message shall be transmitted to identify the broadcast and advise the mariner that there is no navigational warning message traffic on hand.

5 Navigational warning requirements

5 - Navigational warning requirements

5.1 Guidance

5.1.1 Operational guidance for handling and formatting navigational warnings is given in the Joint IMO/IHO/WMO Manual on Maritime Safety Information, the NAVTEX Manual and the International SafetyNET Manual.

5.2 Numbering

5.2.1 Navigational warnings in each series should be consecutively numbered throughout the calendar year, commencing with 1/YY at 0000 UTC on 1 January.

5.2.2 Navigational warnings should be transmitted in reverse numerical order on scheduled broadcasts.

 

5.3 Language

5.3.1 All NAVAREA, Sub-area and coastal warnings should be broadcast only in English in the International NAVTEX and SafetyNET services.

5.3.2 In addition to the required broadcasts in English, NAVAREA, Sub-area and coastal warnings may be broadcast in a national language using national NAVTEX and SafetyNET services and/or other means.

5.3.3 Local warnings may be issued in the national language and/or in English.

 

5.4 "No warnings" message

5.4.1 When there are no navigational warnings to be disseminated at a scheduled broadcast time, a brief unnumbered message should be transmitted to identify the broadcast and advise the mariner that there is no navigational warning message traffic on hand.

6 Co-ordinator resources and responsibilities

6.1 NAVAREA co-ordinator resources

6.1.1 The NAVAREA co-ordinator must have:

1. the expertise and information sources of a well established hydrographic service;
   
   
2. effective communication links with subarea and national co-ordinators in the NAVAREA and with other NAVAREA co-ordinators;
   
   
3. access to effective facilities for transmission to the entire NAVAREA. Reception normally should be possible 700 miles beyond the limit of the NAVAREA (24 hours sailing by a fast ship).
   

6.2 NAVAREA co-ordinator responsibilities

6.2.1 The NAVAREA co-ordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the NAVAREA;
   
   
2. immediately upon receipt, assess all information in the light of expert knowledge for relevance to navigation in the NAVAREA;
   
   
3. select information for broadcast in accordance with the guidance given in 4.2.1 above;
   
   
4. draft NAVAREA warning messages in accordance with the IHO/IMO guidance on standardization of texts and message drafting;
   
   
5. direct and control the broadcast of NAVAREA warning messages, making full and efficient use of national broadcast facilities in keeping with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.
   
   
6. pass NAVAREA warnings which warrant further promulgation in adjacent areas directly to the appropriate NAVAREA co-ordinators, using the quickest possible means;
   
   
7. ensure that written copies of NAVAREA warnings likely to remain in force for more than six weeks are made available to those NAVAREA co-ordinators or national authorities requesting them. Immediate transmission by TELEX, facsimile, or by high-speed communications is recommended in the absence of an alternative appropriate delivery arrangement, subject to agreement between the co-ordinators concerned;
   
   
8. as soon as possible after the receipt of information concerning scheduled underwater operations as described in 4.2.1.3.10, or other scheduled operations such as in 4.2.1.3.3 and 4.2.1.3.11, pass such information to those national co-ordinators in his own NAVAREA and other NAVAREA co-ordinators who maintain a notices to mariners service covering the affected area and who have requested such information;
   
   
9. transmit periodical NAVAREA warnings bulletins;
   
   
10. promulgate the cancellation of NAVAREA warnings which contain information which is no longer valid;
    
    
11. arrange for the text of NAVAREA warnings in force to be available at port offices and, where appropriate, for their eventual inclusion in a generally available printed form;
    
    
12. act as the central point of contact on matters relating to navigational warnings within the NAVAREA;
    
    
13. promote the use of established international standards and practices in the promulgation of navigational warnings within the NAVAREA.
    

Note: Although arrangements made by the NAVAREA co-ordinator should enable all ships to receive messages in force for an area either before reaching or on entering an area, nevertheless it should be possible, in exceptional cases, for ships to obtain, on request, texts of messages in force but not included in the current scheduled broadcasts.

6.3 Subarea co-ordinator resources

6.3.1 The subarea co-ordinator must have, or have access to:

1. expertise and information resources of a well established hydrographic service;
   
   
2. effective communication links with national co-ordinators in the subarea;
   
   
3. effective communication links with the NAVAREA co-ordinator.

Note: Normally a subarea co-ordinator will serve also as a national co-ordinator.

6.4 Subarea co-ordinator responsibilities

6.4.1 The subarea co-ordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the subarea;
   
   
2. inform the NAVAREA co-ordinator of any events in the subarea which warrant the promulgation of a NAVAREA warning;
   
   
3. co-ordinate and promote the exchange of information between national co-ordinators in the subarea and the NAVAREA co-ordinator;
   
4. act as the central point of contact on matters relating to navigational warnings within the subarea;
   
   
5. promote the use of established international standards and practices in the promulgation of navigational warnings within the subarea.
   

6.5 National co-ordinator resources

6.5.1 The national co-ordinator must have:

1. established sources of information relevant to the safety of navigation within national waters;
   
   
2. effective communication links with the subarea/NAVAREA co-ordinator and adjacent national co-ordinators;
   
   
3. access to effective facilities for the transmission of navigational warnings to the region.

6 Co-ordinator resources and responsibilities

6 - Co-ordinator resources and responsibilities

6.1 NAVAREA co-ordinator resources

6.1.1 The NAVAREA co-ordinator must have:

1. the expertise and information sources of a well established national hydrographic service;
   
   
2. effective communication links, e.g. telex, facsimile, e-mail, etc., with subarea and national co-ordinators in the NAVAREA and with other NAVAREA co-ordinators;
   
   
3. access to effective facilities for transmission to the entire NAVAREA. Reception normally should be possible 700 miles beyond the limit of the NAVAREA (24 hours sailing by a fast ship).
   

6.2 NAVAREA co-ordinator responsibilities

6.2.1 The NAVAREA co-ordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the NAVAREA;
   
   
2. immediately upon receipt, assess all information in the light of expert knowledge for relevance to navigation in the NAVAREA;
   
   
3. select information for broadcast in accordance with the guidance given in 4.2.1 above;
   
   
4. draft NAVAREA warning messages in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information (MSI) for the standardization of texts and message drafting;
   
   
5. direct and control the broadcast of NAVAREA warning messages, making full and efficient use of national broadcast facilities in keeping with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended.
   
   
6. pass NAVAREA warnings which warrant further promulgation in adjacent areas directly to the appropriate NAVAREA co-ordinators, using the quickest possible means;
   
   
7. ensure that written copies of NAVAREA warnings likely to remain in force for more than six weeks are made available to those NAVAREA co-ordinators or national authorities requesting them. Immediate transmission by TELEX, facsimile, or by high-speed communications is recommended in the absence of an alternative appropriate delivery arrangement, subject to agreement between the co-ordinators concerned;
   
   
8. as soon as possible after the receipt of information concerning scheduled underwater operations as described in 4.2.1.3.9, or other scheduled operations such as in 4.2.1.3.3 and 4.2.1.3.10, pass such information to those national co-ordinators in his own NAVAREA and other NAVAREA co-ordinators who maintain a notices to mariners service covering the affected area and who have requested such information;
   
   
9. transmit periodical NAVAREA warnings bulletins;
   
   
10. promulgate the cancellation of NAVAREA warnings which contain information which is no longer valid;
    
    
11. arrange for the text of NAVAREA warnings in force to be available at port offices and, where appropriate, for their eventual inclusion in a generally available printed form;
    
    
12. act as the central point of contact on matters relating to navigational warnings within the NAVAREA;
    
    
13. promote the use of established international standards and practices in the promulgation of navigational warnings within the NAVAREA.
    

Note: Although arrangements made by the NAVAREA co-ordinator should enable all ships to receive messages in force for an area either before reaching or on entering an area, nevertheless it should be possible, in exceptional cases, for ships to obtain, on request, texts of messages in force but not included in the current scheduled broadcasts.

6.3 Subarea co-ordinator resources

6.3.1 The subarea co-ordinator must have, or have access to:

1. expertise and information resources of a well established national hydrographic service;
   
   
2. effective communication links with national co-ordinators in the subarea;
   
   
3. effective communication links with the NAVAREA co-ordinator.

Note: Normally a subarea co-ordinator will serve also as a national co-ordinator.

6.4 Subarea co-ordinator responsibilities

6.4.1 The subarea co-ordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the subarea;
   
   
2. inform the NAVAREA co-ordinator of any events in the subarea which warrant the promulgation of a NAVAREA warning;
   
   
3. co-ordinate and promote the exchange of information between national co-ordinators in the subarea and the NAVAREA co-ordinator;
   
4. act as the central point of contact on matters relating to navigational warnings within the subarea; 
   
   
5. promote the use of established international standards and practices in the promulgation of navigational warnings within the subarea; and
   
   
6. monitor the broadcasts which they originated to ensure that the messages have been correctly transmitted.
   

6.5 National co-ordinator resources

6.5.1 The national co-ordinator must have:

1. established sources of information relevant to the safety of navigation within national waters;
   
   
2. effective communication links with the subarea/NAVAREA co-ordinator and adjacent national co-ordinators;
   
   
3. access to effective facilities for the transmission of navigational warnings to the region.

6 Co-ordinator resources and responsibilities

6 - Co-ordinator resources and responsibilities

6.1 NAVAREA coordinator resources

6.1.1 The NAVAREA coordinator must have:

1. the expertise and information sources of a well-established national hydrographic service;
   
   
2. effective communications, e.g., telephone, e-mail, facsimile, internet, telex, etc., with Sub-Area and National coordinators in the NAVAREA, with other NAVAREA coordinators, and with other data providers; and
   
   
3. access to broadcast systems for transmission to the navigable waters of the NAVAREA. As a minimum, this shall include those described in paragraph 3.1.1. Reception should normally be possible at least 700 nautical miles beyond the limit of the NAVAREA (24 hours' sailing by a fast ship).
   
   

6.2 NAVAREA coordinator responsibilities

6.2.1 The NAVAREA coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the NAVAREA;
   
   
2. assess all information immediately upon receipt in the light of expert knowledge for relevance to navigation in the NAVAREA;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft NAVAREA warning messages in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of NAVAREA warning messages, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward NAVAREA warnings and relevant associated information which may require wider promulgation directly to adjacent NAVAREA coordinators and/or others as appropriate, using the quickest possible means;
   
   
7. ensure that NAVAREA warnings which remain in force for more than six weeks are made available immediately to NAVAREA coordinators, other authorities and mariners in general, as appropriate;
   
   
8. ensure that information concerning all navigational warning subject areas listed in paragraph 4.2.1.3 that may not require a NAVAREA warning within their own NAVAREA is forwarded immediately to the appropriate National and NAVAREA coordinators affected by the event;
   
   
9. broadcast in-force bulletins not less than once per week at a regularly scheduled time;
   
   
10. promulgate the cancellation of NAVAREA warnings which are no longer valid;
    
    
11. act as the central point of contact on matters relating to navigational warnings within the NAVAREA;
    
    
12. promote and oversee the use of established international standards and practices in the promulgation of navigational warnings throughout the NAVAREA;
    
    
13. when notified by the authority designated to act on reports of piracy and armed robbery against ships, arrange for the broadcast of a suitable NAVAREA warning. Additionally, keep the national or regional piracy control centre informed of long-term broadcast action(s);
    
    
14. when notified by the appropriate authorities, arrange for the broadcast of suitable NAVAREA warnings to promulgate World Health Organization (WHO) health advisory information; and tsunami-related information;
    
    
15. monitor the broadcasts which they originate to ensure that the messages have been correctly broadcast;
    
    
16. maintain records of source data relating to NAVAREA messages in accordance with the requirement of the National Administration of the NAVAREA coordinator;
    
    
17. coordinate preliminary discussions between neighbouring Member States, seeking to establish NAVTEX services and with other adjacent Administrations, prior to formal application;
    
    
18. contribute to the development of international standards and practices through attendance and participation in the IHO Commission on the Promulgation of Radio Navigational Warnings (CPRNW) meetings, and also participate in relevant IMO, IHO and WMO fora as appropriate, e.g., Sub-Committee on Radiocommunications and Search and Rescue, Expert Team On Maritime Safety Services and other regional conferences, etc., as required; and
    
    
19. take into account the need for contingency planning.
    
    

 

6.3 Sub-Area coordinator resources

6.3.1 The Sub-Area coordinator must have, or have access to:

1. the expertise and information sources of a well established national hydrographic service;
   
   
2. effective communications, e.g., telephone, e-mail, facsimile, internet, telex, etc., with National coordinators in the Sub-Area, with the NAVAREA coordinator, and with other data providers; and
   
   
3. access to broadcast systems for transmission to the entire Sub-Area.
   
   

 

6.4 Sub-Area coordinator responsibilities

6.4.1 The Sub-Area coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the Sub-Area;
   
   
2. assess all information immediately upon receipt in the light of expert knowledge for relevance to navigation in the Sub-Area;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft Sub-Area warning messages in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of Sub-Area warning messages, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward Sub-Area warnings and relevant associated information which may require wider promulgation directly to their own NAVAREA coordinator using the quickest possible means;
   
   
7. broadcast in-force bulletins not less than once per week at a regularly scheduled time;
   
   
8. promulgate the cancellation of Sub-Area warnings which are no longer valid;
   
   
9. act as the central point of contact on matters relating to navigational warnings within the Sub-Area;
   
   
10. promote the use of established international standards and practices in the promulgation of navigational warnings within the Sub-Area;
    
    
11. monitor the broadcasts which they originate to ensure that the messages have been correctly broadcast;
    
    
12. maintain records of source data relating to NAVAREA messages in accordance with the requirement of the National Administration of the NAVAREA coordinator;
    
    
13. contribute to the development of international standards and practices through attendance and participation in relevant IMO, IHO and WMO fora, e.g., Sub-Committee on Radiocommunications and Search and Rescue (COMSAR), CPRNW, Expert Team On Maritime Safety Services, appropriate regional conferences, etc.; and
    
    
14. take into account the need for contingency planning.
    
    

6.5 National coordinator resources

6.5.1 The national coordinator must have:

1. established sources of information relevant to the safety of navigation within national waters;
   
   
2. effective communications, e.g., telephone, e-mail, facsimile, internet, telex, etc., with the NAVAREA/Sub-Area coordinator and adjacent National coordinators; and
   
   
3. access to broadcast systems for transmission to their area of national responsibility.
   
   

6.6 National coordinator responsibilities

6.6.1 The national coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within their area of national responsibility;
   
   
2. assess all information immediately upon receipt in the light of expert knowledge for relevance to navigation in their area of national responsibility;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft coastal warning messages in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of coastal warning messages, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward coastal warning messages and relevant associated information which may require wider promulgation directly to their NAVAREA coordinator and/or adjacent National coordinators as appropriate, using the quickest possible means;
   
   
7. broadcast in-force bulletins not less than once per week at a regularly scheduled time;
   
   
8. promulgate the cancellation of coastal warnings which are no longer valid;
   
   
9. act as the central point of contact on matters relating to navigational warnings within their area of national responsibility;
   
   
10. promote the use of established international standards and practices in the promulgation of navigational warnings within their area of national responsibility;
    
    
11. monitor the broadcasts which they originate to ensure that the messages have been correctly broadcast;
    
    
12. maintain records of source data relating to NAVAREA messages in accordance with the requirement of the National Administration of the NAVAREA coordinator; and
    
    
13. take into account the need for contingency planning.

6 Co-ordinator resources and responsibilities

6 Co-ordinator resources and responsibilities

6.1 NAVAREA Coordinator resources

6.1.1 The NAVAREA Coordinator must have:

1. the expertise and information sources of a well-established national hydrographic service;
   
   
2. effective communications, e.g. telephone, e-mail, facsimile, internet, telex, etc. with Sub-area and National Coordinators in the NAVAREA, with other NAVAREA Coordinators, and with other data providers; and
   
   
3. access to broadcast systems for transmission to the navigable waters of the NAVAREA. As a minimum, this should include those described in paragraph 3.1.1. Reception should normally be possible at least 300 nautical miles beyond the limit of the NAVAREA.
   
   

6.2 NAVAREA Coordinator responsibilities

6.2.1 The NAVAREA Coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the NAVAREA;
   
   
2. assess all information immediately upon receipt for relevance to navigation in the NAVAREA;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft NAVAREA warnings in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of NAVAREA warnings, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward NAVAREA warnings and relevant associated information which may require wider promulgation directly to adjacent NAVAREA Coordinators and/or others as appropriate, using the quickest possible means;
   
   
7. ensure that NAVAREA warnings which remain in force for more than six weeks are made available immediately to NAVAREA Coordinators, other authorities and mariners in general, as appropriate;
   
   
8. ensure that information concerning all navigational warning subject areas listed in paragraph 4.2.1.3 that may not require a NAVAREA warning within their own NAVAREA is forwarded immediately to the appropriate National and NAVAREA Coordinators affected by the event;
   
   
9. broadcast in-force bulletins not less than once per week at a regular scheduled time;
   
   
10. promulgate the cancellation of NAVAREA warnings which are no longer valid;
    
    
11. act as the central point of contact on matters relating to navigational warnings within the NAVAREA;
    
    
12. promote and oversee the use of established international standards and practices in the promulgation of navigational warnings throughout the NAVAREA;
    
    
13. when notified by the authority designated to act on reports of piracy and armed robbery against ships, arrange for the broadcast of a suitable NAVAREA warning. Additionally, keep the national or regional piracy control centre informed of long-term broadcast action(s);
    
    
14. when notified by the appropriate authorities, arrange for the broadcast of suitable NAVAREA warnings to promulgate World Health Organization (WHO) health advisories, tsunami-related warnings, and other information which is necessary for safe navigation;
    
    
15. monitor the broadcasts which they originate, to ensure that the warnings have been correctly broadcast;
    
    
16. maintain records of source data relating to NAVAREA warnings in accordance with the requirement of the National Administration of the NAVAREA Coordinator;
    
    
17. coordinate preliminary discussions between neighbouring Member States, seeking to establish or amend NAVTEX services, and with other adjacent Administrations, prior to formal application;
    
    
18. contribute to the development of international standards and practices through attendance and participation in the IHO World-Wide Navigational Warning Service Sub-Committee meetings, and also participate in relevant IMO, IHO and WMO fora as appropriate; and
    
    
19. take into account the need for contingency planning.
    
    

6.3 Sub-area Coordinator resources

6.3.1 The Sub-area coordinator must have, or have access to:

1. the expertise and information sources of a well-established national hydrographic service;
   
   
2. effective communications, e.g. telephone, e-mail, facsimile, internet, telex, etc. with National Coordinators in the Sub-area, with the NAVAREA Coordinator, and with other data providers; and
   
   
3. broadcast systems for transmission to the entire Sub-area.
   
   

6.4 Sub-area Coordinator responsibilities

6.4.1 The Sub-area Coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within the Sub-area;
   
   
2. assess all information immediately upon receipt for relevance to navigation in the Sub-area;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft Sub-area warnings in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of Sub-area warnings, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward Sub-area warnings and relevant associated information which may require wider promulgation directly to their own NAVAREA Coordinator using the quickest possible means;
   
   
7. broadcast in-force bulletins not less than once per week at a regular scheduled time;
   
   
8. promulgate the cancellation of Sub-area warnings which are no longer valid;
   
   
9. act as the central point of contact on matters relating to navigational warnings within the Sub-area;
   
   
10. promote the use of established international standards and practices in the promulgation of navigational warnings within the Sub-area;
    
    
11. monitor the broadcasts which they originate to ensure that the warnings have been correctly broadcast;
    
    
12. maintain records of source data relating to Sub-area warnings in accordance with the requirement of the National Administration of the Sub-area Coordinator;
    
    
13. contribute to the development of international standards and practices through attendance and participation in the IHO World-Wide Navigational Warning Service Sub-Committee meetings, and also participate in relevant IMO, IHO and WMO fora as appropriate; and
    
    
14. take into account the need for contingency planning.
    
    

6.5 National Coordinator resources

6.5.1 The National Coordinator must have:

1. established sources of information relevant to the safety of navigation within national waters;
   
   
2. effective communications, e.g. telephone, e-mail, facsimile, internet, telex, etc. with the NAVAREA/Sub-area Coordinator and adjacent National Coordinators; and
   
   
3. access to broadcast systems for transmission to their area of national responsibility.
   
   

6.6 National Coordinator responsibilities

6.6.1 The National Coordinator must:

1. endeavour to be informed of all events that could significantly affect the safety of navigation within their area of national responsibility;
   
   
2. assess all information immediately upon receipt for relevance to navigation in their area of national responsibility;
   
   
3. select information for broadcast in accordance with the guidance given in paragraph 4.2.1 above;
   
   
4. draft coastal warnings in accordance with the Joint IMO/IHO/WMO Manual on Maritime Safety Information;
   
   
5. direct and control the broadcast of coastal warnings, in accordance with the provisions of the International Convention for the Safety of Life at Sea, 1974, as amended;
   
   
6. forward coastal warnings and relevant associated information which may require wider promulgation directly to their NAVAREA/Sub-area Coordinator and/or adjacent National Coordinators as appropriate, using the quickest possible means;
   
   
7. broadcast in-force bulletins not less than once per week at a regular scheduled time;
   
   
8. promulgate the cancellation of coastal warnings which are no longer valid;
   
   
9. act as the central point of contact on matters relating to navigational warnings within their area of national responsibility;
   
   
10. promote the use of established international standards and practices in the promulgation of navigational warnings within their area of national responsibility;
    
    
11. monitor the broadcasts which they originate to ensure that the warnings have been correctly broadcast;
    
    
12. maintain records of source data relating to coastal warnings in accordance with the requirement of the National Administration of the National Coordinator; and
    
    
13. take into account the need for contingency planning.

Annex 2 IMO procedures for amending the WWNWS

IMO Procudure for amending the World-Wide navigational warning service

1. Proposed amendments to the world-wide navigational warning service should be submitted to the Maritime Safety Committee for evaluation.
   
   
2. Amendments to the service should normally come into force at intervals of approximately two years or at such longer periods as determined by the Maritime Safety Committee at the time of adoption. Amendments adopted by the Maritime Safety Committee will be notified to all concerned, will provide at least 12 months notification and will come into force on 1 January of the following year.
   
   
3. The agreement of the International Hydrographic Organization and the active participation of other bodies should be sought according to the nature of the proposed amendments.
   
   
4. When the proposals for amendment have been examined in substance, the Maritime Safety Committee will entrust the Sub-Committee on Radiocommunications with the ensuing editorial tasks.
   
   
5. The NAVAREA schedule of broadcast times and frequencies, not being an integral part of the service and being subject to frequent changes, will not be subject to the amendment procedures.

Anenx 2 IMO procedures for amending the World-Wide Navigational Warning Service

IMO Procudure for amending the World-Wide navigational warning service

1. Proposed amendments to the world-wide navigational warning service should be submitted to the Maritime Safety Committee for evaluation.
   
   
2. Amendments to the service should normally come into force at intervals of approximately two years or at such longer periods as determined by the Maritime Safety Committee at the time of adoption. Amendments adopted by the Maritime Safety Committee will be notified to all concerned, will provide at least 12 months notification and will come into force on 1 January of the following year.
   
   
3. The agreement of the International Hydrographic Organization and the active participation of other bodies should be sought according to the nature of the proposed amendments.
   
   
4. When the proposals for amendment have been examined in substance, the Maritime Safety Committee will entrust the Sub-Committee on Radiocommunications and search and rescue with the ensuing editorial tasks.
   
   
5. The NAVAREA schedule of broadcast times and frequencies, not being an integral part of the service and being subject to frequent changes, will not be subject to the amendment procedures.

Anenx 2 IMO procedures for amending the World-Wide Navigation Warning Service

Annex 2 - IMO procedures for amending the World-Wide Navigation Warning Service

1. Proposed amendments to the world-wide navigational warning service should be submitted to the Maritime Safety Committee for evaluation.
   
   
2. Amendments to the service should normally come into force at intervals of approximately two years or at such periods as determined by the Maritime Safety Committee at the time of adoption. Amendments adopted by the Maritime Safety Committee will be notified to all concerned, will provide at least 12 months notifications and will come into force on 1 January of the following year.
   
   
3. The agreement of the International Hydrographic Organization and the active participation of other bodies should be sought according to the nature of the proposed amendments.
   
   
4. When the proposals for amendment have been examined in substance, the Maritime Safety Committee will entrust the Sub-Committee on Radiocommunications and Search and Rescue with the ensuing editorial tasks.
   
   
5. The NAVAREA schedule of broadcast times and frequencies, not being an integral part of the service and being subject to frequent changes, will not be subject to the amendment procedures.

Anenx 2 IMO procedures for amending the World-Wide Navigation Warning Service

Annex 2 - IMO procedures for amending the World-Wide Navigation Warning Service

1. Proposals for amendment or enhancement of the World-Wide Navigational Warning Service must be submitted for evaluation by the appropriate Sub-Committee. Amendments will only be adopted after the approval of the Maritime Safety Committee (MSC).
   
   
2. Amendments to the service should normally be adopted at intervals of approximately two years or at such longer periods as may be determined by the Maritime Safety Committee. Amendments adopted by the Maritime Safety Committee will be notified to all concerned, will provide at least 12 months' notification and will come into force on 1 January of the following year.
   
   
3. The agreement of the International Hydrographic Organization and the active participation of other bodies must be sought according to the nature of the proposed amendments.
   
       
4. The schedule of broadcast times and frequencies for the WWNWS, being subject to frequent changes, will not be subject to these amendment procedures, but must be coordinated through the International SafetyNET Coordinating Panel or the IMO NAVTEX Coordinating Panel, as appropriate.

Appendix Geographical areas for co-ordinating and promulgation NAVAREA warnings

Geographical areas for co-ordinating and promulgating NAVAREA warnings

Appendix Geographical areas for co-ordinating and promulgation NAVAREA warnings

Geographical areas for co-ordinating and promulgating NAVAREA warnings

The delimitation of these NAVAREAs is not related to and shall not prejudice the delimitations of any boundaries between States.

Appendix Geographical areas for co-ordinating and promulgation NAVAREA warnings

Geographical areas for co-ordinating and promulgating NAVAREA warnings

The delimitation of these NAVAREAs is not related to and shall not prejudice the delimitations of any boundaries between States.

• Informatietype: Internationaal
• Documentsoort: Resolutie
• Toegangsrechten: Intern
• Identificatie: PUC_1444_14
• Versie: 2
• Datum beschikbaarheid: 05-08-2013
• Geldigheid van: 06-11-1991
• tot en met: 31-12-2019
• Wijzigingsdatum: 13-09-2022
• Titel: Res.A.706(17) - World-Wide Navigational Warning Service
• Organisatie: International Maritime Organization (IMO)
• Taal: Nederlands
• Thema: A./Res. 700 until 799