A vertical plate or board for steering a boat.


Related Terms

BALANCED RUDDER

A rudder design where the pivot point and the center of its area meet, reducing the effort needed to turn it.

It has about 20% of the rudder area forward of the rudder axis.

GUDGEON

A metal socket into which the pintle of a boat's rudder fits.

PINTLE

The pin or bolt on which a ship's rudder pivots. The pintle rests in the gudgeon.

WHIPSTAFF

The vertical lever controlling ship’s rudder

HELM

The wheel or tiller controlling the rudder.

COUNTER

The part of the stern above the waterline that extends beyond the rudder stock culminating in a small transom. A long counter increases the waterline length when the boat is heeled, so increasing hull speed.

LEE HELM

The tendency of a sailboat to turn to leeward in a strong wind when there is no change in the rudder's position. This is the opposite of weather helm and is the result of a dynamically unbalanced condition.

FIXED PROPELLER

A propeller mounted on a rigid shaft protruding from the hull of a vessel, usually driven by an inboard motor; steering must be done using a rudder. See also outboard motor and sterndrive.

OUTBOARD MOTOR

A motor mounted externally on the transom of a small boat. The boat may be steered by twisting the whole motor, instead of or in addition to using a rudder.

STEERING BOARD

A long, flat board or oar that went from the stern to well underwater, used to steer vessels before the invention of the rudder. Traditionally on the starboard side of a ship (the 'steering board' side).

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