(Continued form Part 2.)
General Mobile Radio Service (GMRS)
GMRS is a personal radio service that uses the same frequencies and channels as FRS, but more power is allowed, and there are greater equipment options. The FCC defines GMRS as “A mobile two-way voice communication service, with limited data applications, for facilitating activities of individual licensees and their family members, including, but not limited to, voluntary provision of assistance to the public during emergencies and natural disasters.” 47 CFR 95.1703. Note that unlike FRS or CB, GMRS requires a license. 47 CFR 95.1705. There is no test, and the license covers you and your immediate family. It costs $70 for 10 years, and you will be assigned a call sign. GMRS stations are required to identify themselves by their call signs at the end of each transmission and periodically during transmissions. 47 CFR 95.1751. Many people operate on GMRS without a license, but doing so is illegal.
In addition to blister-pack type handhelds, it is legal to operate mobile, fixed, and base station radios as well as repeaters on a subset of the GMRS frequencies. GMRS covers all 22 of the FRS channels, and there are an additional 8 GMRS channels available that are exclusive to GMRS: 467.5500, 467.5750, 467.6000, 467.6250, 467.6500, 467.6750, 467.7000, and 467.7250. 47 CFR 95.1763. These additional channels are, however, reserved for use by fixed GMRS stations and stations using repeaters, so they are not useful for simple communication between handheld radios. For use between handheld radios, the frequencies are the same for FRS and GMRS.
Transmitters must be certified by the FCC to be legal on GMRS, and the rules expressly provide that if a transmitter has the capabilities to operate in the amateur radio service it can’t be GMRS certified. 47 CFR 95.1761 (c). This means you cannot use a Baofeng UV5R for GMRS (or FRS) without breaking the law.
The power limits for GMRS vary depending on which channel you are on. It can be up to 50 watts for some channels and is limited to 0.5 watts for others. 47 CFR 95.1767.Continue reading“Radios for Emergency and SHTF Use – Part 3, by Rufus King”