high frequency communication system (HF)

high-frequency communication

high-frequency communication facilities

high-frequency 'X-band' system

pulse repetition frequency (PRF) / pulse-repetition frequency

high frequency (HF)

high frequency direction finder

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

super high frequency weapon

high frequency transducer

high-frequency sound waves

very high-frequency omnidirectional range / omnirange (VOR)

ultra-high frequency

high frequency band

high frequency channel

high-frequency transceiver

very high-frequency omnirange / omnidirectional range (VOR)

extremely high frequency phased array tracking radar

high pulse repetition frequency (HPRF)

high pulse repetition frequency radar

high-pulse repetition frequency waveform

very high frequency (VHF)

merchant ship communication system (mercomm system)

high altitude-high opening (HAHO)

high pay-off target / high-payoff target (HPT)

high-burst / high burst (HB)

high road; high-road

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

high-performance / high performance

two-frequency glide path system

two-frequency localizer system

digital radio frequency memory (DRFM) decoy system

command and control communication system (C2CS)