Launch and recovery techniques for submersible vehicles and other payloads
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United States of America Patent
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Jul 12, 2016
Grant Date -
Mar 26, 2015
app pub date -
Nov 15, 2012
filing date -
Nov 15, 2011
priority date (Note) -
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Abstract
A subsea payload such as an AUV (autonomous underwater vehicle) or an AUV garage is lifted from an underwater location by flying a latch unit through the water to the payload. The latch unit carries a lift line toward the payload. The latch unit is then attached to the payload and the payload is lifted using tension applied through the lift line via the latch unit. The latch unit can also be used on a lift line to lower a payload and then to release the payload at an underwater location. The lift line is supported by a heave-compensating winch on a surface vessel that effects z-axis movement of the latch unit. The winch maintains tension on the lift line to prevent the lift line falling on the payload. Movement of the latch unit on x- and y-axes is effected by on-board thrusters.
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