A Pilot

1. A person who steers a ship, a helmsman.
2. 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.
3. A guide book for maritime navigation.
4. An instrument for detecting the compass error.
5. (Australia, road transport, informal) A pilot vehicle.
6. (Australia, road transport) A person authorised to drive such a vehicle during an escort.
7. A guide or escort through an unknown or dangerous area.
8. Something serving as a test or trial.

    (mining) The heading or excavation of relatively small dimensions, first made in the driving of a larger tunnel.

9. (aviation) A person who is in charge of the controls of an aircraft.
10. (television) A sample episode of a proposed TV series produced to decide if it should be made or not. If approved, typically the first episode of an actual TV series.
11. (rail transport) A cowcatcher.
12. (motor racing) A driver.
13. A pilot light.
14. One who flies a kite.
15. A short plug, sometimes made interchangeable, at the end of a counterbore to guide the tool.