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sculling boats 
Boats in which the rowers have two oars and there are one, two, four and sometimes eight rowers; a sculling boat is rarely guided by a coxswain.
sculling (two oars)
Race in which the rowers grip one oar in each hand.
single scull
Sculling boat for one rower; it is the smallest and lightest of the rowboats.
coxless double
Sculling boat for two rowers; like the single scull, it is rudderless and is steered by applying unequal force against the oars.
