Life Jacket and Lifejacket Light are very important tool when at a maritime emergency time, which may help you keep alive in seawater. here will introduce general requirements on ships.
A lifejacket shall not sustain burning or continue melting after being totally enveloped in a fire for a period of 2 s.
An adult lifejacket shall be so constructed that:
a.at 75% of persons, who are completely unfamiliar with the lifejacket, can correctly don it within a period of 1 min without assistance,guidance or prior demonstration;
b.arter demonstration,all persons can correctly don it within a period of 1 min without assistance;
c.it is clearly capable of being worn in only one way or,as far as is practicable,cannot be donned incorrectly;
d.it is comfortable to wear;and
e.it allows the wearer to jump from a height of at least 4.5 m into the water without injury and without dislodging or damaging the lifejacket.
An adult lifejacket shall have sufficient buoyancy and stability in clam fresh water.
An adult lifejacket shall allow the person wearing it to swim a short distance and to board a survival craft.
A lifejacket shall have buoyancy which is not reduced by more than 5% after 24 h submersion in fresh water.
Each lifejacket shall be fitted with a whistle firmly secured by a cord.
A lifejacket which depends on inflation for buoyancy shall have not less than two separate compartments and comply with the requirements of the general requirment of lifejacket.
Inflate automatically on immersion,be provided with a device to permit inflation by a single manual motion and be capable of being inflated by mouth.
Each lifejacket light shall:
- Have a luminous intensity of not less than 0.75cd in all directions of the upper hemisphere;
- Have a source of energy capable of providing a luminous intensity of 0.75 cd for a period of at least 8 h.
- Be visible over as great a segment of the upper hemisphere as is practicable when attahed to a lifejacket;and
- Be of white color,