Oar

An oar is a tool used to move a boat through water. Oars have a flat blade at one end, and the oarsmen grasp the other end. The difference between oars and paddles is that paddles are held by the paddler, and are not connected with the vessel, whereas oars generally are fastened to the vessel. The use of oars is called rowing. An oar used at the stern (rear) of a boat to steer is called a steering oar.^[1]

1. ↑ "steering oar, noun". Merriam-Webster, Incorporated. Retrieved 21 October 2015.