Aviation Dictionary

On this page you will find a searchable and comprehensive alphabetical list of aviation terms. You can help us make it the most comprehensive list in the world. If we have missed anything, click on the ‘send us your word’ button to send us your word, acronym or definition and we will consider adding it to our dictionary.

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This can be referred to with the distance between aircraft, where in controlled airspace, ATC will ensure sufficient spacing between aircraft, while in uncontrolled airspace, the pilot needs to ensure sufficient spacing between other aircraft. Spacing can also be referred to as the correct distance between the downwind leg and the runway. This spacing is usually conducted at circuit altitude, and where the runway ‘intersects’ part of the airframe in the line of sight of the pilot. The purpose of correct spacing is to ensure that circuits are not flow too wide so that in the event of an engine failure during any part of the circuit, the aircraft is still able to return to the runway to conduct a landing.

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