A rowlock (British, ) or oarlock (US)'s a brace that attaches an oar to a boat. When a boat's rowed, the rowlock acts as a fulcrum, and, in doing so, the propulsive force that the rower exerts on the water with the oar's transferred to the boat by the thrust force exerted on the rowlock. On ordinary rowing craft, the rowlocks are attached to the gunwales. In the sport of rowing, the rowlocks are attached to outriggers (often just called "riggers"), which project from the boat and provide better… (More on Oarlock)