Onderwerp: Bezoek-historie

922 - Recommendations On Performance Standards And Tests For Thermal Protective Lifejackets
Geldigheid:06-04-1999 t/m Status: Geldig vandaag

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Ref.T1/3.02                                                                                                                    MSC/Circ.922




1 The Maritime Safety Committee, at its seventy-first session (19 to 28 May 1999), responding to the interests expressed by several delegations for the Organization to develop performance standards for thermal protective lifejackets, approved Recommendations on performance standards and tests for thermal protective lifejackets (TP-lifejackets), as set out in the annex.

2 TP-lifejackets may be used in addition to, or in replacement of, on a one-for-one basis, SOLAS-approved lifejackets.

3 Member Governments are invited to bring the annexed Recommendations to the attention of shipping companies, shipowners, ship operators and all other parties concerned.





1 General

1.1 Lifejackets provide buoyancy and prevent a person from drowning. They also support an unconscious person in a position where the mouth and nose are clear of the water. However, lifejackets virtually offer no thermal protection.

1.2 Immersion suits offer buoyancy and thermal protection. They are intended for use by trained personnel and are less suitable for use by untrained passengers.

1.3 These recommendations on performance standards and tests refer to thermal protective lifejackets (TP-lifejackets) which should considerably prolong the time before unconsciousness in cold water and allow the wearers full mobility. They should also significantly reduce the initial cold shock for a person falling into cold water.

2 Performance Standards

A TP-lifejacket should, in addition to meeting the requirements contained in section 2.2 of the International

Life-Saving Appliance (LSA) Code:

.1 be constructed to minimize the fall of the wearers body core temperature;

.2 permit the person wearing it to:

.1 climb up and down a vertical ladder at least 5 m in length; and

.2 perform normal activities associated with abandonment; and

.3 be so constructed that, when worn in conjunction with warm clothing, the TP-lifejacket continues to provide sufficient thermal protection to ensure, at least, that, when it is worn for a period of 2h in calm circulating water at a temperature of 10°C, the wearer's body core temperature does not fall more than 2°C.

3 Performance Tests

3.1        ATP-lifejacketshouldbesubjectedtotheprototypeandproductiontestsapplicabletolifejackets listedinPart1,section2andPart2,section2oftheannextotheRevisedRecommendationontestingof life-savingappliances(resolutionMSC.81(70)),asitmaybeamended.


3.2        ATP-lifejacketshouldalsobesubjectedtothefollowingtestswhichshouldbecarriedoutwithtest subjectsasdefinedinparagraph3.1.1oftheannextoresolutionMSC.81(70),asitmaybeamended:


.1         Testsofphysicalcharacteristics:


.1         donningtest(paragraph3.1.4oftheAnnextoresolutionMSC.81(70),asitmay beamended);


.2         ergonomictest(paragraph3.1.5oftheAnnextoresolutionMSC.81(70),asitmay beamended);and


.3         fieldofvisiontest(paragraph3.1.6oftheAnnextoresolutionMSC.81(70),asit maybeamended).


.2         Testsofthermalprotectivecharacteristics:


.1         general (paragraphs 3.2.1, 3.2.2, 3.2.3 and 3.2.4 of the Annex to resolution



.2         thetestsubjectsshouldwearastandardrangeofclothingconsistingof:


.1         underwear(shortsleeved,shortlegged);


.2         shirt(longsleeved);


.3         trousers(notwoollen);


.4         woollensocks;and


.5         twowoollenpullovers;and


.3         the test subjects should be placed in calm circulating water at a temperature

of10ºCandstaythereforaminimumperiodof2h. Thetestsubjects'bodycore temperature shouldnotfallmorethan2ºCbelowthenormallevelofthetest subjects'temperature.

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