Watercraft (1) with a
keel-shaped hydrofoil (25) arranged on a
keel (20) and a
rudder-shaped hydrofoil (35) arranged on a
rudder (30), wherein the sword and / or the
rudder wing (25, 35) are electrically adjustable, - with an electronic distance sensor (60) arranged on the bow or mast of the
watercraft (1) for non-contact detection of a distance to a water surface, - with a
control unit (70) for controlling an
angle of attack of the sword and / or rudder wing (25, 35), wherein the
control unit (70) is designed such that the angles of
attack of the sword and / or rudder wings (25, 35) are controlled depending on the distance detected by the electronic distance sensor (60), characterized in that that the
water level sensor (60) is arranged on the bow or mast in such a way that a distance to a water surface in front of the
watercraft (1) is detected, and that the sword (20) has a capacitive
water level sensor (80) for detecting the sword wing immersion depth (h) KT ) and / or distance (h R ) of the
hull (10) to the water surface.