A rowlock for single-oar sculling of a boat comprises a U-shaped cradle (1) and a spindle (2) which projects from the closed end of the cradle in the opposite direction to the arms (3) of the latter. The inner surfaces (4) of the arms (3) are flat and mutually parallel, being interconnected in the valley of the cradle (1) by a curved surface (5) which is inclined to the axis of the spindle (2) at 45 DEG and has a slight saddle curvature. In use, the spindle (2) is rotatably mounted in a socket at the stern of the boat and the configuration of the inner surface (4, 5) of the cradle (1) ensures that the rowlock provides sufficient leverage for an efficient sculling stroke. The parallel arms (3) allow the rowlock to swivel easily with the shaft of an oar without becoming unshipped, as is the case when conventional rowlocks with curved arms are used, and the curved surface (5) ensures that the oar is at the correct working angle. IMAGE
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