Abstract: A propelling machine (2) is configured curved- tubular, on a ship bottom (1b), with a front casing (12) having a suction inlet (11) opening fore to water, an impeller casing (10) having an impeller (17) inscribed thereto, and a rear casing (14) having a delivery outlet (13) opening aft to water, and the impeller (17) is forward and reverse rotatable.

Abstract: A scoop strainer has a rim to attach the strainer to an outer surface of a hull of a marine vessel over a through-hull fitting intended to admit water to the interior of the hull. The strainer has small openings therethrough to pass water but not large undesired objects or marine life, and a larger opening to permit access to the interior of the strainer and to the through-hull fitting to clean out marine growth and the like. A cover is hinged to the strainer and is movable between an open, access position and a closed position. A threaded fastener passing through the cover threads into the rim to selectively hold the access cover closed.

Abstract: An anchor retrieving device adapted to be interposed between an anchor and one end of a main anchoring line. The anchor includes a shank having a crown end and at least one fluke.