1 in 60 Rule
The 1 in 60 rule is a rule of thumb used in air navigation, and states that if a pilot has travelled sixty miles then an error in track of 1 nm is approximately a 1° error. It is based on the small-angle approximation. In reality the error is 0.96° but this difference is trivial in air navigation.
You can also use the 1 in 60 rule to approximate your distance from a VOR by flying 90 degrees to a radial and timing how long it takes to fly 10 degrees. The time in seconds divided by 10 is roughly equal to the time in minutes from the station at your current speed.
Aircraft-based augmentation system
An augmentation system which augments and/or integrates the information obtained from the other GNSS elements with information available on board the aircraft.
‘Abortive Start’ (turbine engines) means an attempt to start, in which the engine lights up, but fails to accelerate.
‘Accessory drives’ means any drive shaft or utility mounting pad, furnished as a part of the auxiliary power unit, that is used for the extraction of power to drive accessories, components, or controls essential to the operation of the auxiliary power unit or any of its associated systems.
Accident. An occurrence associated with the operation of an aircraft which, in the case of a manned aircraft, takes place
Accredited representative. A person designated by a State, on the basis of his or her qualifications, for the purpose of
A.C.D. - Additional Control Device
Aircraft classification number (ACN). A number expressing the relative effect of an aircraft on a pavement for a specified
“acrobatic flight” means manoeuvres intentionally performed by an aircraft involving an
Acts of unlawful interference
Acts of unlawful interference. These are acts or attempted acts such as to jeopardize the safety of civil aviation, including but