The Hiker Responsibility Code says “Be prepared..to stay together” on the trail. BSA rules require adequate supervision. But how do we stay together and be safe on a troop hike with thirty or forty Scouts? We can hike in independent groups, each with two adults and a crew first aid kit. Or, we can stay in touch with radio communications.
Crew 27 in our area has a scheme for coordination on a hike. Each independent group has a radio. The last group, “sweep”, has adults and a radio. All groups check in every 15 minutes. If a group cannot communicate with sweep, they halt and wait for the groups behind them to get closer. A hike group can relay messages to and from a forward group.
What kind of radio? FRS/GMRS (Family Radio Service, General Mobile Radio Service) radios are affordable and don’t require a license. They work over a fairly short range, maybe a half-mile in the mountains or a forest for FRS channels (0.5 Watt transmit power) or farther for GMRS channels (1 or 2 Watts).
REI has a good guide to outdoor FRS radios.
If a patrol wants to hike with more separation, each group (including sweep) can have someone with an amateur radio license. An amateur radio HT (Handheld Transceiver, often called a “Walkie Talkie”), has more power (5 to 8 Watts) and a range of one or two miles, especially with an improved antenna. Some HT’s only cost a little more than FRS radios. The least expensive models change frequently, but good models tend to cost between $30 and $70. You pay more for ease of use, ruggedness, and a better antenna.
The test for the Technician amateur radio license is not that hard. It is a 35 question test and you need to get 26 correct answers (74%). All the questions are public, so you can practice as much as you want, free. The hamexam.org site is a good place to practice. It isn’t a trivial test—even though I have the highest level of FCC amateur license, I just missed two questions on a practice test.
Try a Technician test and see how close you are. There are study programs and amateurs who are willing to help (“Elmers”). I’m willing to help.