Though life rafts are subjected to mandatory routine inspection required by the law for safety purposes, the natural wear and tear eventually occur over the years.
Though the extent and the speed of deterioration vary depending on the loads the ships transport and the conditions under which they are commissioned, according to the study conducted by the organization for the inspection of ship supplies, the deterioration progresses rapidly after 8 - 12 years in use. From the safety standpoint, it is recommended certain items be replaced with new ones after 8 - 12 years. Overturn-Prevention.
1. Symmetrical packing in the container ensures that the raft will always be upright when inflated.
2. The raft is held together by a rope line until inflation reaches the proper level.
3. Then, the line automatically releases, allowing the raft to inflate fully and properly.
Specifications and Performance
How overturn-Prevention mechanism works
Rafts is folded into half and the upper portion and lower portion is connected by string.

Cylinder up

Cylinder down
 
Raft continues to inflate and when the pressure reaches a certain point, the half restrain cord is broken and raft unfolds right side up regardless of the position.
Raft is fixed so that it stays on the water half folded in the process of inflation.