Applies to Admiralty operations not described by any other Admiralty classifications. Includes pilots who board ships and guide them in and out of ports, crew members of a barge used to cut weeds or vegetation from bottom rooted plants in lakes and streams and crews that conduct trial test runs of newly constructed boats or submarines. Assigned to gambling vessels weighing 15 tons or greater. Contemplates ferries of a wide variety of sizes and weights. The ferry may operate on a year round or seasonal basis. This classification specifically includes doc workers, workers who service boats with gas and oil, repair and maintenance workers, mooring operations, ticket takers and/or sellers and night security personnel. Contemplates shuttle service utilizing hydrofoil or hovercrafts by analogy. Supply boats contemplated by this classification are generally smaller type vessels that supply other shipping vessels with limited supplies of water, gasoline, oil, foodstuffs and other miscellaneous goods. Also applies to tugboats and the mooring of ships in connection with these operations. The classification is all -inclusive with regard to oyster boats.