Float on, Float off ships (Flo-Flo)

Float on, Float off ships are Specialized Heavy Lift Ships, also known as Float-on/Float-off (FLO/FLO) or semisubmersible ships. Such Flo-Flo ship provide the capability to load, Transport and offload outsized cargo independent of port equipment traditionally used for handling large or extremely heavy cargo, such as tug boats, barge, landing craft, floating cranes, and single anchor leg mooring systems. Lifts range from approximately 50 to as much as 45,000 tons. These ships are designed to take on ballast water in floodable tanks that partially submerges the vessel. Cargo is then floated over the submerged portion of the vessel which then deballasts and surfaces under the cargo. After the vessel is full afloat, the cargo is secured for transport.

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