Definition
A small, secondary map window displayed within the main moving-map area of an electronic flight display, showing additional navigation, weather, traffic, or terrain information at a different scale or focus than the primary map view.
Plain English
A small map-within-a-map on the cockpit display that shows extra information alongside the main view.
Context Anchor
Seen on electronic flight displays during the instrument scan, often in a corner or side area of the main flight screen.
Derivation
From 'inset,' meaning something set into or placed inside something larger. The word goes back to Old English settan (to set or place), with 'in' added to mean placed within. In aviation displays, an inset map is literally a smaller map set inside the main map area.
Why Pilots Care
Keeps position awareness available while the pilot's primary attention stays on attitude, altitude, and airspeed during instrument flight.
Intuition Check
Do not assume an inset map is a separate full-screen map. In this context, it is a smaller map placed inside the main flight display.
Example Sentence 1
The pilot enabled the traffic inset map to keep an eye on nearby aircraft while continuing to view the full route on the main display.
Example Sentence 2
During the scan start, the inset map showed the airport ten miles ahead.