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