Apparatus for handling submersibles at sea

Ships – Mother ship – floating landing platform – and harbor – Vessel carrier

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114 61, 405185, 414137, 414141, B63B 3502

Patent

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043122876

ABSTRACT:
A ship or other vessel having a moonpool therein and an enclosed space above the moonpool is provided with a pontoon which floats on the surface of the sea within the moonpool. The effects of the enclosed space is that said sea surface is calm even when the ambient sea is subject to an adverse swell, and the effect of the pontoon is that it will remain substantially stationary and be independant of the vessels heaving motion, i.e. the pontoon is de-coupled from the vessel. Lifting gear mounted on the pontoon is used to lower and raise submersibles, sub-sea equipment, tethered bells or divers (tethered or free swimming). The pontoon may be used as a stable work area and for loading and unloading cargo; in the latter case, a housing forming the enclosed space above the moonpool has a double opening through which the cargo can pass, but only on opening at a time is opened so as to preserve the enclosed space above the moonpool.

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