General Mobile Radio Service [General Mobile Radio Service - Wikipedia](https://en.wikipedia.org/wiki/General_Mobile_Radio_Service) # License * No test required * Cheap fee: $35 * Assigned call sign * Lasts 10 years * Covers immediate family members as well * Registration: [Universal Licensing System \| Federal Communications Commission](https://www.fcc.gov/wireless/universal-licensing-system) # Range * Line-of-sight * On flat ground, 1-2 miles between handheld radios # Frequencies * 30 channels across 462-467 MHz * 16 main channels * 14 interstitial channels * 8 main channels in 462 MHz may be used for [[Simplex Communication]] or [[repeater]] outputs. * 8 main channels in 467 MHz may only be used as repeater inputs, in conjunction with the 462 MHz channels as outputs. The repeater input frequencies are exclusive to GMRS, and may be used only by licensed GMRS operators. * Operators are permitted to transmit up to 50 watts on the 16 main channels * 1-5 watts are more typical * Shares the 22 [[FRS]] channels ![[Pasted image 20250301213520.png]] **See:** [[Radio Communications Log]]. # Communication Procedure * Call sign must be provided (verbally or morse code) every 15 minutes and at the end of a conversation.