Patent ID: 8182175

Claim:
A marine gate, comprising: a gate member submersible in a body of water, wherein the body of water is defined by a sea floor and a waterline; at least a first post and a second post supporting the gate member, wherein the first and second posts extend from a first location at the sea floor to a second location above the waterline and wherein the gate member is slidably secured on the first and second posts so that the gate member is movable between the first and second locations; a winch; a cable extending from the winch to the gate member; and an optic fiber net attached at least to the gate member and extending to the sea floor, thereby establishing an underwater fence; wherein operation of the winch alters a length of the cable, thereby permitting the gate member to be raised to a closed position and to be lowered to an opened position such that a vessel may pass through the gate when the gate member is in the opened position.