Draft:Launch and Recovery System

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A LARS (Launch and Recovery System) is a mechanical device or set of mechanical devices that are used for lowering large, heavy items into bodies of water as well as retrieving them from the water. Launch and recovery systems are used routinely for launching and recovering ROVs, FRCs (Fast Rescue Crafts), and work boats.

A-Frame and Winch LARS[edit]

Most launch and recovery systems are composed of a winch and an A-Frame[1]. This type of system is the most common type of LARS because it is commonly deemed to be the safest and most reliable method of transporting heavy objects in and out of the water. The A-Frame is rotated forward and backward using hydraulic power while the cable is reeled in or out at a synchronized speed. In cases where the launch and recovery system is installed on a floating vessel, the winch will sometimes be heave compensated, which allows for the item to be held steady regardless of the rocking motion of the vessel.

Crane-Based LARS[edit]

Crane-based LARS are less common than systems composed of an A-Frame and a winch, but they are also in use. Because cranes are versatile systems with many uses, they are already installed on many vessels and places where a heavy object might need to be launched into or recovered from the water. Some cranes are also heave compensated[1], which allows them to hold the item steady regardless of the rocking motion of the vessel on which they are installed.


  1. ^ a b Paschoa, Claudio Claudio Paschoa is Marine Technology Reporter's correspondent in Brazil Email: paschoa@marinelink com (2015-01-19). "Understanding ROV Launch and Recovery Systems – Part 1". Marine Technology News. Retrieved 2019-07-26.

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