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2. Shortwave bands - Wikipedia

   en.wikipedia.org/wiki/Shortwave_bands

   Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...

3. List of military electronics of the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_military...

   Very high frequency (VHF) two-frequency long range early warning radar: General Electric: AN/FPS-26: Height finder radar: AN/FPS-27: S-band Frequency Diverse (FD) search radar: Westinghouse Electronics: AN/FPS-30: Long range early warning radar: AN/FPS-35: Frequency diverse long range air defense search radar: Sperry Corporation: AN/FPS-41: S ...

4. SINCGARS - Wikipedia

   en.wikipedia.org/wiki/SINCGARS

   Vehicular 50-watt long-range dismountable short-range – with manpack accessories ... Radio Operator's Handbook (FM 24-19), Headquarters Department of the Army ...

5. Sd.Kfz. 234 - Wikipedia

   en.wikipedia.org/wiki/Sd.Kfz._234

   The Sd.Kfz. 234 was commonly used in pairs, one equipped with a long-range radio communications kit while the other possessed only a short-range radio. The long-range unit was identifiable by the large "star" antenna on the left side of the vehicle. Some sources suggest that the Sd.Kfz. 234/2 was used by the following combat units: [8]

6. Marine VHF radio - Wikipedia

   en.wikipedia.org/wiki/Marine_VHF_radio

   Marine radio was the first commercial application of radio technology, allowing ships to keep in touch with shore and other ships, and send out a distress call for rescue in case of emergency. Guglielmo Marconi invented radio communication in the 1890s, and the Marconi Company installed wireless telegraphy stations on ships beginning around 1900.

7. Longwave - Wikipedia

   en.wikipedia.org/wiki/Longwave

   Tuning dial on 1946 Dynatron Merlin T.69 console radio receiver, showing LW wavelengths between 800 and 2000 metres (375–150 kHz). In radio, longwave, long wave or long-wave, [1] and commonly abbreviated LW, [2] refers to parts of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band.