GMRS for Family Communication
If your family needs better two-way radios than the basic FRS models, GMRS is a great option. It allows more power, lets you use external antennas, and can connect to repeaters for longer range. This makes it reliable for road trips, camping, hikes, or coordinating around the neighborhood. But with 30 channels to choose from, picking the right ones means knowing a bit about band plans and radio etiquette. Here’s a practical guide to programming your family’s GMRS radios for both direct and repeater use.
GMRS Channels: Simplex and Repeater
First, understand the basic layout. The FCC sets aside 22 channels for simplex (direct) communication and 8 for repeater use. The difference is important:
- Simplex Channels (1-22): These are for radio-to-radio talk. Everyone must be on the same channel and within line-of-sight. Channels 1-7 and 15-22 are shared with FRS, but GMRS radios can use more power on them.
- Repeater Channels (15-22, with offsets): Channels 15-22 can also work with repeaters. A repeater is a fixed station that picks up your signal and rebroadcasts it, which can extend your range by miles.
You have to program your radio correctly for each mode. A good family plan will include both types of channels.
Best GMRS Channels for Families
Primary Family Simplex Channels
For everyday, short-range talk, simplex channels are what you’ll use most. Pick a main channel and a backup to avoid traffic.
- Channel 20 (462.675 MHz): This is the national GMRS calling channel. Use it to make initial contact, then switch to another channel to talk. Program it as your first quick-select channel.
- Channel 19 (462.665 MHz) & Channel 21 (462.700 MHz): These are common talk channels near the calling channel. They work well for family communication. Make Channel 19 your main family channel and use 21 as a backup.
- Channels 1-7: Good for very local use, like at a busy campground or fair. Power is limited here, and they’re shared with FRS, so they’re often less crowded by longer-range GMRS users. A solid choice for a dedicated kids' channel.
Programming Tip: Label your channels clearly in the radio, like "FAMILY MAIN" or "KIDS LOCAL." Make sure every family radio has the same labels.
Using GMRS Repeaters for More Range
If you’re in vehicles or need to talk over hills, a repeater makes a big difference. Using one requires specific settings:
- Channels 15-22 (Repeater Inputs): To use a repeater, your radio must transmit on one frequency and listen on another, 5 MHz higher. This is the +5 MHz offset.
- CTCSS/DCS Tones: Most repeaters need a sub-audible tone to open. You must program this tone into your radio’s transmit setting for that channel.
Example: To program a local repeater on "GMRS 550" (output 462.550 MHz):
- Frequency: RX 462.550 / TX 467.550
- Offset: +5.000 MHz
- CTCSS Tone: 141.3 Hz (as listed for that repeater)
Label this channel "RPT-550." Always listen first to see if it’s busy, and use your FCC call sign when you talk.
Creating a Family Communication Plan
For Road Trips
On the highway, simplex range between cars is often just a mile or two. Plan ahead:
- Primary: Pick a simplex channel like 19 or 21 for routine chat.
- Repeater Strategy: Find and program repeaters along your route using a directory. This can keep you connected for many miles.
- Check-in Protocol: Set a time for regular radio checks, like every hour. If you lose simplex contact, the lead car should try calling on a pre-programmed repeater channel.
For Camping and Hiking
In the outdoors, line-of-sight matters most. Plan for split-up groups.
- Base Camp Channel: Choose a simplex channel (like 16) for the base camp to monitor. Leave one radio on and listening at camp.
- Excursion Channel: Groups leaving camp should use a different channel (like 17) for their own talk, but check in on the base camp channel periodically.
- Power Settings: Use low power (0.5W-2W) for talk around the campsite to save battery. Switch to high power only when trying to reach distant hikers or in an emergency.
Emergency Use and Channel 20
GMRS is not a replacement for 911, but it can be critical when cell phones don’t work.
- Channel 20 (462.675 MHz) is the standard emergency and calling channel. Everyone in the family should know to go to Channel 20 at high power in a real emergency.
- Emergency Protocol: Teach this procedure: say "EMERGENCY" three times, then give your family call sign, location, and the problem. Repeat the call. If you hear an emergency call, acknowledge it and help if you can.
- Backup Emergency Channel: Channel 16 (462.600 MHz) is sometimes used as a secondary channel by off-road groups. Programming it as a backup is a good idea.
Rules and Best Practices
Following FCC rules keeps the airwaves clear and avoids trouble.
- Get a License: You need an FCC GMRS license. It costs $35, lasts 10 years, and covers your immediate family.
- Use Your Call Sign: Program your FCC call sign into the radio if possible. You must say it at the start and end of a conversation, or every 15 minutes during long talks.
- Follow Power Limits: Use an FCC-certified GMRS radio. Don’t exceed power limits (50W on main channels, 5W on shared channels 1-7). It’s illegal to use modified business or ham radios on GMRS.
- Be Considerate: Avoid unnecessary chatter, don’t interfere with others, and always listen before you transmit. Teach kids to use the radios responsibly.