An electronic ultrahigh-frequency navigational aid system for aircraft that measures bearing and distance from a ground beacon.
- ‘Everyone in the package seemed to be in place as I watched the air-to-air tacan steady to the briefed range.’
- ‘As luck would have it, my tacan quit working.’
- ‘I turned on my TACAN and dialed the frequency of the ship.’
- ‘I then tuned in channel 93 on my TACAN and received a good azimuth and a distance of 125 miles to Ubon Air Base.’
1950s: from tac(tical) a(ir) n(avigation).