A type of radar navigation and blind-bombing system used for guiding military aircraft, esp. during the Second World War (1939–45): see quot…

A navigational radar system in which the positions of aircraft near an airport are determined by ground radar and then transmitted to pilots in…

(part of) a navigation system in which short-range omnidirectional VHF transmitters serve as radio beacons.

= omni-range n. at omni-, comb._form affix. Usually attributive.

A navigational aid system for aircraft which measures bearing and distance from a ground beacon. Frequently attributive.

a device to assist or automate navigation.

An electronic navigation and communication system.

An electronic navigation and weapon-aiming system. Usually attributive, esp. in nav/attack system.