What is GMRS (General Mobile Radio Service)?
GMRS (General Mobile Radio Service) is a licensed radio service.
GMRS consists of 16 UHF channels on FM, plus 7 channels that are shared with FRS.
The maximum allowable power for a GMRS radio is 50 watts. The GMRS channels which are shared with FRS are limited to 5 watts of power.
The use of repeaters is allowed on GMRS. Most GMRS repeaters use CTCS (Control Tone Coded Squelch).
GMRS Frequencies
The frequencies assigned solely to GMRS are:
| Designator | Simplex or Repeater Output | Repeater Input |
|---|---|---|
| 550 | 462.550 MHz | 467.550 MHz |
| 575 | 462.575 MHz | 467.575 MHz |
| 600 | 462.600 MHz | 467.600 MHz |
| 625 | 462.625 MHz | 467.625 MHz |
| 650 | 462.650 MHz | 467.650 MHz |
| 675 | 462.675 MHz | 467.675 MHz |
| 700 | 462.700 MHz | 467.700 MHz |
| 725 | 462.725 MHz | 467.725 MHz |
The frequencies which GMRS shares with FRS are:
| Designator | Frequency | FRS Channel |
|---|---|---|
| 5625 | 462.5625 MHz | 1 |
| 5875 | 462.5875 MHz | 2 |
| 6125 | 462.6125 MHz | 3 |
| 6375 | 462.6375 MHz | 4 |
| 6625 | 462.6625 MHz | 5 |
| 6875 | 462.6875 MHz | 6 |
| 7125 | 462.7125 MHz | 7 |
462.675 is the unofficial GMRS channel for emergencies and assistance.
GMRS Licensing
GMRS licenses are good for five year and cover the licensee and his or her family. The GMRS license fee is $75.
The apply for a GMRS license, use the FCC's Universal Licensing System.
Additional Reading on GMRS
For official information on GMRS, visit the FCC's page on General Mobile Radio Service (GMRS).
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Books on GMRS
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