2.5.1 A thermal protective aid shall be made of
waterproof material having a thermal conductance of not more than
7800 W/(m2K) and shall be so constructed that, when used
to enclose a person, it shall reduce both the convective and evaporative
heat loss from the wearer's body.
2.5.2 The thermal protective aid shall:
-
.1 cover the whole body of persons of all sizes
wearing a lifejacket with the exception of the face. Hands shall also
be covered unless permanently attached gloves are provided;
-
.2 be capable of being unpacked and easily donned
without assistance in a survival craft or rescue boat; and
-
.3 permit the wearer to remove it in the water
in not more than 2 min, if it impairs ability to swim.
2.5.3 The thermal protective aid shall function
properly throughout an air temperature range -30°C to +20°C.