BAND | DESIG | FREQUENCY | NAVAL USE | |
ELF | Extremely Low Frequency | 3Hz-30Hz | None | |
SLF | Super Low Frequency | 30Hz-300Hz | None | |
ULF | Ultra Low Frequency = AF = Audio Frequencies | 300Hz-3000Hz | Audio Frequency into a transmitter modulator and out of a receivers demodulator. | |
VLF | Very Low Frequency | 3kHz-30kHz | International time checks and submarine received Morse Code signals from shore. | |
LF | Low Frequency | 30kHz-300kHz | Distress (eg 500 kHz CW) and local coastal communications | |
MF | Medium Frequency | 300kHz-3000kHz | Distress (eg 2182 kHz DSB) and local coastal communications. | |
HF | High Frequency or Shortwave | 3MHz-30MHz | Long distance communications via the ionosphere, one way, either ship to shore or quite separately, shore to ship. | |
VHF | Very High Frequency | 30MHz-300MHz | Aircraft communications, radar, commercial shipping, and port working. | |
UHF | Ultra High Frequency | 300MHz-3000MHz | Submarine Satcoms, aircraft, radars and intership working. | |
SHF | Super High Frequency | 3GHz-30GHz | Ship Satcoms, radar and missile telemetry. | |
EHF | Extremely High Frequency | 30GHz-300GHz | Radar and telemetry. |