Adopted on 6
(Agenda item 10)
PERFORMANCE STANDARDS FOR NARROW-BAND DIRECT PRINTING
EQUIPMENT FOR THE RECEPTION OF NAVIGATIONAL
WARNINGS AND URGENT
INFORMATION TO SHIPS (MSI) BY HF
( SOLAS Reg IV/14.1 )
RECALLING Article 15(j) of the Convention on the International Maritime Organization
concerning the functions of the Assembly in relation to regulations and guidelines
concerning maritime safety,
A.420(XI) on the development of the maritime distress and safety system which recommends
that Administrations should introduce narrow-band direct-printing (NBDP) broadcasts for
the promulgation of navigational and meteorological warnings to shipping
NOTING FURTHER resolution A.525(13) on performance
standards for NBDP telegraph equipment for the reception of navigational and
meteorological warnings and urgent information to ships on the frequency 518 kHz,
CONSIDERING that high-frequency (HF) NBDP broadcasts
may be used in the global maritime distress and safety system (GMDSS),
HAVING CONSIDERED the recommendation made by the Maritime Safety
Committee at its fifty-eighth session,
1. ADOPTS the
Performance Standards for Narrow-Band Direct-Printing Telegraph Equipment for the
Reception of Navigational and Meteorological Warnings and Urgent Information to Ships
(MSI) by HF, set out in the annex to the present resolution;
2. RECOMMENDS Governments to ensure that equipment for the reception of
NBDP broadcasts of navigational and meteorological warnings and urgent information to
ships (MSI) by HF conforms to performance standards not inferior to those specified in
the annex to the present resolution;
FURTHER Governments to allow ships carrying MF/HF radio installations in accordance with
resolution A.613(15) to use such equipment in lieu of equipment complying with the
standard specified in the annex to the present resolution, until the GMDSS is fully
implemented in accordance with regulations IV/1.5.2 and IV/1.6 of the 1988 amendments to
the International Convention for the Safety of Life at Sea, 1974.
1 The equipment should conform to the provisions of CCIR
Recommendation 688 applicable to shipborne equipment and, in addition, to the
provisions given in the following paragraphs.
2 The equipment should be capable of producing a printed copy of received
information. The equipment functions should include signal reception, processing,
printing and the means to control the frequency of the radio receiver both manually
3 Details of the
coverage areas and message categories which have been excluded by the operator from
reception should be readily available.
The receiver should operate on the frequencies prescribed by the Radio Regulations for
the system .
5 The equipment should be
provided with a facility to test that the radio receiver, signal processor and
printing device are functioning correctly.
6 The equipment should be capable of internally storing at least 255
message identifications. After between 60 and 72 h a message identification should
automatically be erased from the store. If the number of received message
identifications exceeds the capacity of the store, the oldest message identification
should be erased.
7 Only message
identifications which have been satisfactorily received should be stored; a message is
satisfactorily received if the character-error ratio is below 4%.
8 The receipt of search and rescue information should
give an alarm at the position from which the ship is normally navigated. It should be
possible only to reset this alarm manually.
9 Information for location (B1)* and message (B2)* designators in
programmable memories should not be erased by interruptions in the power supply of
less than 6 h.
10 The receiver sensitivity
should be equal to or better than 6 μV e.m.f. at the receiver input to produce an NBDP
output character-error rate of not greater than 10- 2.
11 The printing device should be able to print at least 32
characters per line.
12 If automatic line
feed entails division of a word, this shall be indicated in the written text. The
printing device should automatically feed paper after completing the printed message.
13 The equipment should print an asterisk
if a character is received mutilated.
AUTC clock, accurate to at least one second, and associated with a reprogrammable
memory which contains the frequency sequence and UTC broadcast schedules of all
stations, should control the HF receiver to provide automatic MSI reception.
* See CCIR Recommendation 540.