high frequency over-the-horizon (HF OTH) radar

forward scatter-over-the-horizon radar (OTH)

over the horizon (OTH)

over-the-horizon ground-based radar

over-the-horizon radar

over-the-horizon radar (OTHR)

artificial horizon (gyro horizon/ attitude indicator)

artificial horizon / attitude indicator, gyro-horizon

attitude indicator / artificial horizon, gyro-horizon

gyro-horizon / artificial horizon, attitude indicator

high-power illuminator radar / high power illuminating radar (HIPIR)

over-the-horizon forces

over-the-horizon range

over-the-horizon communication

over-the-horizon communications

over-the-horizon optical communication

over-the-horizon radio

extremely high frequency phased array tracking radar

high pulse repetition frequency radar

radar cross-section / radar cross section (RCS); radar signature; radar crossover

fire over open sights (fire over sights)

radar horizon

beyond-the-horizon ground-based radar (BTH)

beyond the horizon radar (BTHR)

pulse repetition frequency (PRF) / pulse-repetition frequency

high frequency (HF)

high frequency direction finder

high-frequency 'X-band' system

super high frequency weapon

high frequency transducer

high-frequency sound waves

very high-frequency omnidirectional range / omnirange (VOR)

ultra-high frequency