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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Overhead Join

A procedure for aircraft to join an aerodrome circuit safely. This is normally done at a minimum of 500 feet above the circuit height with a descent to circuit height on the non-traffic side of the aerodrome circuit. It is important to be familiar with the specific aerodrome plates as the circuit direction can be either left hand or right hand based on the wind direction, aerodrome layout for noise control over populated areas, terrain, or other operational requirements 

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