According to SOLAS Chapter III & LSA Code
> Immersion suit constructed with waterproof materials
> Unpacked and donned without assistance within 2 min along with a life jacket or any associated clothing
> Resist burning or continue melting for a period of 2 seconds
> It should cover the whole body except the face.
> No undue ingress of water into the suit after a jump from a height of not less than 4.5 m into the water.
> If it designed to be worn without a lifejacket, it should comply the requirements for life-jackets
> the lifejacket shall be worn over the immersion suit
> Person should be able to climb up and down at least 5 m in length
> Swim and board a boat
> jump from a height of not less than 4.5 m into the water
> one for every crew, In passenger vessels 3 immersion and 1 TPA per person per lifeboat