- marked with instructions that it must be worn in conjunction with warm clothing;
- so constructed that, when worn in conjunction with warm clothing, it gives thermal protection such that, the wearer’s body core temperature does not fall more than 2°C for a period of 1h in calm circulating water at a temperature of 5°C.
An immersion suit made of material with inherent insulation Shall (in addition to the general requirements):
- ensure that the wearer’s body core temperature does not fall more than 2°C after a period of 6h immersion in calm circulating water at a temperature of between 0°C and 2°C.
Note:
An immersion suit which also complies with the requirements of life-jackets may be classified as a life-jacket. It shall be fitted with a light and the whistle complying with the requirements for life-jackets.
If the immersion suit is to be worn in conjunction with a lifejacket, the lifejacket shall be worn over the immersion suit. A person wearing such an immersion suit shall be able to don a lifejacket without assistance.
