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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Clock Code

A way of identifying the position of yourself or someone else based on the hour positions of a clock. Eg: 12 o’clock will be directly in front of you, 3 o’clock will be 90 degrees to your right. We can also add in high or low to the position, so 12 o’clock high would mean that the other aircraft is directly in front of you, as well as above your altitude. 12 o’clock low would be in front of your position as well as below your altitude.

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