Definition
The total angular area, measured in degrees, that is visible through an optical instrument or display at any one moment without moving the eye, head, or device.
Plain English
How much you can see through a lens, scope, or display at one time, measured as an angle.
Context Anchor
Used when discussing cockpit visibility, looking for traffic, viewing instruments or displays, and using windows, lenses, or cameras.
Derivation
From 'field' meaning an open expanse and 'view' meaning the act of seeing; together describing the area visible to the observer.
Why Pilots Care
A sufficient field of view is critical for maintaining situational awareness and detecting traffic or obstacles.
Analogy
Like looking through a paper towel tube versus a wide window: same eye, very different amount of the world visible at once.
Intuition Check
Do not think of field of view as the specific object you are looking at. It means the whole area you are able to see from that position at that moment.
Example Sentence 1
The new HUD has a wider field of view, so the pilot can see more flight information without scanning across the panel.
Example Sentence 2
Due to the limited field of view from the aft camera, the pilot had to rely on wing walkers during taxi.