A tiller or till's a lever attached to a rudder post (American terminology) or rudder stock (English terminology) of a boat that provides leverage for the helmsman to turn the rudder. The tiller's normally used by the helmsman directly pulling or pushing it, but it may also be moved remotely using tiller lines. Rapid or excessive movement of the tiller results in an increase in drag and will result in braking or slowing the boat. In steering a boat, the tiller's always moved in the direction op… (More on Tiller)