Patent ID: 7827925

Claim:
An apparatus for use in a dock system of a marine vessel for performing launch and recovery of a boat stowed in the dock system, while the marine vessel makes headway, wherein the dock system includes a dock at a stern part of the marine vessel for containing the boat therein and a stern opening in the dock for launching the boat outboard therethrough and for recovering the boat by entry of the boat therethrough into the dock, the apparatus comprising: a conduit device having an outlet port disposed on one of a front end wall portion of the dock and a side wall portion of the dock and opening to the dock, for carrying out an intake of water around the vessel and delivering the water through the outlet port to the dock during entry of the boat into the dock, and forming a backward water stream directed toward the stern opening in a waterway inside of the dock for discharge to the outboard area through the stern opening, wherein said conduit device includes a water intake port which opens on an exterior lateral surface of a hull of the marine vessel under a water level for receiving from the intake port a relative water current caused along the hull by the headway navigation of the vessel, and means for closing and opening the intake port to control the intake of water and conducting the water current to be introduced into the intake port.