In rowing, the competitor faces the rear of the boat and wields an oar that pivots in an oarlock, which acts like a fulcrum. The boats are called shells, with a subclassification of sculls. All sculls are shells, but not all shells are sculls. In a scull, each crew member rows with two oars, one on either side, called sculling oars. Other shells have one oar, a sweep oar, per crew member.
Men also race in coxless four and lightweight coxless four.
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