Scull, to

To the river boatman it is to pull a boat with a
pair of oars. To the seagoing boatman it is to propel a boat with a single oar
over the stern by sweeping it from side to side while twisting it. A good
dinghy will have a half-round sculling-notch in the transom to take the single
oar. (See also: Wangle, to.)