Final answer:
A manpack radio is the device used for long-range UHF satellite communication, suitable for carrying more information and requiring a clear line of sight.
Step-by-step explanation:
The man-pack portable radio used for long-range, single-channel UHF satellite communication is known as a manpack radio. Unlike walkie-talkies, FM radio, or ham radios, a manpack radio is designed specifically for military or tactical use, providing reliable communication over long distances using ultra-high frequency (UHF) bands. Since microwaves are used for long-distance land-based and satellite transmissions due to their ability to carry more information per unit time, and require a clear line of sight between the transmitter and receiver due to their short wavelengths, manpack radios make use of this frequency range to communicate effectively within their design specifications.