As used in this chapter:
"Aircraft" includes balloon, aeroplane, seaplane and every other vehicle used for navigation through the air. A seaplane, while at rest on water and while being operated on or immediately above water, shall be governed by rules regarding water navigation; while being operated through the air otherwise than immediately above water, it shall be treated as aircraft.
"Airman" includes aviator, pilot, balloonist, and every other person having any part in the operation of aircraft while in flight.
"Passenger" includes any person riding in an aircraft but having no part in its operation.
N.J.S. § 6:2-1