pilot
noun
°(nautical) A person who steers a ship, a helmsman.
°(nautical) A person who knows well the depths and currents of a harbor or coastal area, who is hired by a vessel to help navigate the harbor or coast.
adjective
°Made or used as a test or demonstration of capability. (pilot run, pilot plant).
°Used to control or activate another device. (pilot light).
verb
°To control (an aircraft or watercraft).
°To guide (a vessel) through coastal waters.