Canadian Aviation Regulations — 101.01
 d’entraînement en vol ) flight training unit means (a) in the case of an aeroplane or helicopter, the holder of a flight training unit operator certificate, or (b) in the case of a glider, balloon, gyroplane or ultra-light aeroplane, a person, club, school or other organization that conducts flight training; ( unité de formation au pilotage ) flight training unit operator certificate means a certificate issued under Subpart 6 of Part IV that authorizes the holder of the certificate to operate a flight training service; ( certificat d’exploitation d’unité de formation au pilotage ) flight visibility means the visibility forward from the cockpit of an aircraft in flight; ( visibilité en vol ) flight watch means maintaining current information on the progress of a flight and monitoring all factors and conditions that might affect the flight; ( surveillance de vol ) FS unit or flight services unit means an ATS unit that provides services, other than air traffic control services, for the safe movement of aircraft; ( unité FS ou unité des services de vol ) glider means a non-power-driven heavier-than-air aircraft that derives its lift in flight from aerodynamic reactions on surfaces that remain fixed during flight; ( planeur ) GNSS means global navigation satellite system; ( GNSS ) ground station means a location on the ground equipped with radio transmitting and receiving equipment capable of two-way voice communications with an aircraft; ( station au sol ) ground visibility , in respect of an aerodrome, means the visibility at that aerodrome as contained in a weather observation reported by (a) an air traffic control unit, (b) an air traffic services unit, (c) a community aerodrome radio station, (d) an AWOS used by the Department of Transport, the Department of National Defence or the Atmospheric Environment Service for the purpose of making aviation weather observations, or (e) a radio station that is ground-based and operated by an air operator; ( visibilité au sol ) gyroplane means a heavier-than-air aircraft that derives its lift in flight from aerodynamic reactions on one or more non-power-driven rotors on substantially vertical axes; ( autogire ) hang glider means a glider that is designed to carry not more than two persons and has a launch weight of 45 kg (99.2 pounds) or less; ( aile libre ) heading means the direction in which the longitudinal axis of an aircraft is pointed, usually expressed in true, magnetic or grid degrees from North; ( cap ) heavier-than-air aircraft means an aircraft supported in the atmosphere by lift derived from aerodynamic forces; ( aérodyne ) helicopter means a power-driven heavier-than-air aircraft that derives its lift in flight from aerodynamic reactions on one or more power-driven rotors on substantially vertical axes; ( hélicoptère ) helicopter Class A external load means an external load that cannot move freely, cannot be jettisoned and does not extend below the landing gear; ( charge externe de classe A pour hélicoptère ) helicopter Class B external load means an external load that can be jettisoned and that is not in contact with land, water or any other surface; ( charge externe de classe B pour hélicoptère ) helicopter Class C external load means an external load that can be jettisoned and that remains in contact with land, water or any other surface; ( charge externe de classe C pour hélicoptère ) helicopter Class D external load means an external load with a person carried externally or any external load, other than a Class A, B or C external load; ( charge externe de classe D pour hélicoptère ) heliport means an aerodrome in respect of which a heliport certificate issued under Subpart 5 of Part III is in force; ( héliport ) high level airspace means airspace at or above 18,000 feet ASL that is within Canadian Domestic Airspace; ( espace aérien supérieur ) high seas means any body of water, or frozen surface thereof, that is not within the territorial waters of any state; ( haute m