Definition
A rear-facing radar system mounted on a military aircraft that detects other aircraft or missiles approaching from behind and alerts the crew to the threat.
Plain English
A radar that watches the area behind the aircraft and warns the crew if something is coming up on their tail.
Context Anchor
Seen mainly in military or specialized aircraft defensive-system discussions, not in normal light-airplane flying.
Derivation
Radar comes from “radio detection and ranging,” meaning detecting an object and finding its distance by using radio waves. “Tail” points to the rear of the aircraft, so the phrase means radar that watches the area behind the airplane.
Why Pilots Care
Provides early warning of rear threats, allowing time for evasive maneuvers or countermeasures in combat or tactical situations.
Analogy
It is somewhat like a rear-facing sensor on a car, but for airborne threats behind an aircraft rather than nearby objects while parking.
Intuition Check
Do not read “tail warning” as a warning that the aircraft’s tail is damaged. It means the radar is watching the area behind the aircraft and warning the crew about something approaching from that direction.
Example Sentence 1
The bomber's tail warning radar picked up a fast-closing aircraft six miles behind them.
Example Sentence 2
During the night mission the crew relied on the tail warning radar to monitor for any aircraft approaching from behind.