control surface

Noun

 * 1)  A moveable surface attached to a machine such as an aircraft or submarine that can be used to control the machine's motion in roll, pitch or yaw.
 * Before flight, it is vital to ensure all control surfaces are clear of obstruction and can move smoothly and freely.

Synonyms

 * (in a submarine)

Translations

 * Finnish: ohjainpinta
 * German: Steuerfläche
 * Italian: superficie di controllo,, timone di direzione (verticale), timone di profondità (orizzontale)
 * Romanian: suprafață de control