The term "tug" appears to have derived from an early 1800's British vessel of that name which was used to assist larger ships in docking and undocking. A TUG has a deep hull, usually rounded or some approximation thereof by use of one or more hard chines, a "pointy" bow (called a model — from "modeled" bow), and the propeller or propellers are deep in the water. A tug is generally designed to operate safely in rough water conditions — openings can be made water-tight, doors have high thresholds so water can flow past but not into, there are scuppers to allow water taken on deck to run off and there is safety equipment carried on board.
Kingstonunderwater is the personal property of Tom Rutledge and all pictures are by Tom Rutledge, occasionally Photos from Dan Mackay, James Pate, Anne Campbell, Barry Mutch, Kevin Ripley and Sean Felts may get posted as they would more then likely use my camera on a dive with me or have access to their own equipment in most of those cases I would be the subject as well.
Kingston Underwater supports the Great Lakes Underwater Explorer Club (GLUE) out of Northern Tech Diver - Divers that practice and preach wreck conservation like Save Ontario Shipwrecks.
