Definition
An Emergency Obstruction Video Map (EOVM) is a controller's radar display overlay that shows terrain and obstruction information for use only in an emergency, when an aircraft is unable to maintain the minimum IFR altitude. It allows the controller to issue vectors below the published minimum vectoring altitude (MVA) or minimum IFR altitude when no other safe option exists.
Plain English
It is a special map the controller can pull up on the radar screen, showing where the high ground and tall obstacles are, so they can guide a pilot in an emergency when normal altitude rules can't be followed.
Context Anchor
Seen in instrument procedure and airport obstacle information, especially when reviewing emergency options for departure, arrival, or maneuvering near an airport.
Derivation
Emergency' marks its restricted use, 'obstruction' refers to the terrain and tall objects shown, and 'video map' is the ATC term for an overlay drawn on the controller's radar scope. The name describes exactly what it is: a map of obstructions, displayed on video, used only in emergencies.
Why Pilots Care
Gives controllers immediate visual reference to keep an aircraft clear of terrain during urgent situations.
Grounding Statement
Picture having an engine problem shortly after takeoff in low visibility; the EOVM helps show where the nearby obstacles and high ground are before you maneuver.
Intuition Check
Do not read “video map” as a moving video. Here it means a visual map display. Also, an EOVM is information for an emergency; it is not a clearance or a substitute for a published procedure.
Example Sentence 1
After the engine failure, the controller used the EOVM to vector the aircraft around rising terrain while it descended toward the nearest airport.
Example Sentence 2
During the engine failure, the EOVM helped vector the plane toward the nearest suitable airport.