单词	tacan
释义	tacan /ˈtak(ə)n / noun [mass noun] An electronic ultra-high-frequency navigational aid system for aircraft, which 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. Origin 1950s: from tac(tical) a(ir) n(avigation).
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