Abstract: Marine vessels used for collecting floating debris from water employing a collection bucket which dumps debris in one spot directly behind the collection area are known. A debris collection bucket locatable in an open chamber, both of which having water passageways extending therethrough is disclosed. The bucket is movable between the open chamber and a debris dumping area. Gate means is provided which cooperates with the bucket. The gate is moveable between a gate open position permitting debris to enter the debris collection area, and a gate closed position impeding entry of debris when the bucket proceeds to dump collected debris. A primary boom which extends centrally and longitudinally of the vessel is pivotally connected to both the vessel and the bucket. The boom is telescopically and vertically movable between the debris collection area and the debris dumping area which can extend centrally along a substantial length of the vessel.