![]() ![]() ![]() The size, number and the capacity of the lifeboat for a merchant vessel is decided by the type of the ship and number of ship’s crew, but it should not be less than 7.3 m in length and minimum two lifeboats are provided on both side of the ship (port and starboard). SOLAS and LSA code Requirements for lifeboat: the only difference is that the freefall lifeboat is not lowered till 1m above water level, it is launched from the stowed position by operating a lever located inside the boat which releases the boat from rest of the davit and boat slides through the tilted ramp into the water. In Free fall lifeboat, the launching mechanism is similar to on load release. As the lever is operated from inside, it is safe to free the boat without going out of the lifeboat, when there is a fire on the ship. A lever is provided inside the boat to operate this mechanism. Normally the on-load release is operated when the boat is about to touch the surface of the water so that the fall is smooth without damaging the boat and harming the crew inside. The load will be still in the fall as the boat would not have touched the water. On load mechanism can release the lifeboat from the wire, with the ship above the water level and with all the crew members inside the boat. There is a safety pin arrangement provided near the clutch box, which disables the offload release (in case of rough weather or hydrostatic piston malfunction) allowing the operator to perform onload release of the lifeboat. The piston will continue to move up, pushing the lever and as a result, it will operate the hook arrangement releasing the fall wire. the piston is connected to the operating lever via a link. As the ship becomes waterborne, the water pressure will move the hydrostatic piston up. There is a hydrostatic piston unit provided at the bottom. The offload mechanism releases the boat after the load of the boat is transferred to water or the boat has been lowered fully into the sea. By releasing the hook the lifeboat can be set free to propel away from the ship. These mechanisms release the boat from the davit, which is attached to a wire or fall by means of a hook. There are two types of lifeboat releasing mechanisms- on load and offload. Types of lifeboat releases: On load and offload release. In this article, we will take a look at the main types of lifeboat releasing mechanisms and also learn about the SOLAS requirements for lifeboats. Not all the lifeboats have the same type of releasing mechanisms, for the launching of a lifeboat depends on several other factors. There are different types of lifeboats used on board a ship on the basis of the type of ship and other special requirements. ![]()
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