You searched for: “electronic distance measuring equipment
electronic distance measuring equipment, electronic distance-measuring equipment
A navigation system consisting of airborne devices which transmit microsecond pulses to special ground beacons and that retransmit the signals to an aircraft.

The length of expired time between a transmission and a reception is measured, converted to kilometers or miles, and presented to a pilot of an aircraft.

This entry is located in the following units: electro-, electr-, electri- (page 62) -tron, -tronic, -tronics + (page 8)