The rudder is the part used to turn the vehicles moving on the water in the desired direction such as ship or boat. Although it is usually made of wood, it is also made using hair material. The rudder mounted on the stern of the ship has a fan-like shape. The pieces of wood inserted into the slots on the head to manage the rudder are called rudder tillers. The rudder cabinet is the name given to the device produced to turn the mechanism connected to the rudder tiller.

The use of rudder cabinets is known as comfort for boat captains. On long journeys, rudder steering helps reduce the load on the captain. It is stated by the captains who use a cupboard rudder that it is more useful than tiller rudder. It is indispensable for the captains who prefer comfort.