Answer: teleran

AnswerCrossword Clue
TELERANElectronic aid for aircraft.
TELERANAerial navigation aid.
TELERANAircraft navigation system.
TELERANAerial navigation system
TELERANAerial-navigation system
TELERANOne of 10 real navigation aids
TELERANNavigational aid
telerannavigational aid that uses radar to map the sky above an airfield, which, together with a map of the airfield itself, is transmitted by television to aircraft approaching the field