Scull
From KayakWiki
Sculling is a stroke in which the paddle slices from side to side. The paddler changes the angle of the paddle on each side to side motion to propel the kayak in a direction perpendicular to the arc followed by the paddle.
Sculling a vertical paddle will make the kayak move in the direction of the paddle. Sculling a horizontal paddle provides bracing.
Learning to scull should be considered one of the most important steps in developing paddling proficiency. The sculling stroke, more than most any other stroke, develops good paddle control and really develops a paddler's feel for the paddle. Sculling, in the Greenland tradition, leads to rolling techniques. It also allows for fine motion control of a kayak.

