The shoulder is a ball and socket joint with a large range of movement. Such a mobile joint tends to be more susceptible to injury. Shoulder pain can stem from one or more of the following causes: Strains from overexertion.
The gunwale (/ËÉ¡ÊnÉl/) is the top edge of the side of a boat. Originally the gunwale was the gun ridge on a sailing warship. This represented the strengthening wale or structural band added to the design of the ship, at and above the level of a gun deck.
Boat building, one of the oldest branches of engineering, is concerned with constructing the hulls of boats and, for sailboats, the masts, spars and rigging. Water tank-a large irregular shaped container(s), often made of stainless steel, that is usually fitted into the bilges of a voyaging boat. 2  The tank often has a deck mounted inlet, a vent pipe and a pump to move water to taps, showers etc. 3  Mounted low in the hull, it adds significantly to stability when full.