What's this 4-20 thing?Here is a programming table I made for the Baofeng radios ...
The Baofeng UV-5R has memory for 128 channels, so I just put all the basic FRS, GMRS and "Popular" snowmobile channels in, then the rest is just a combination of the first 14 FRS channels and 5 CTCSS codes per channel.
Basically it gives you 128 channels to pick from and since Baofeng radios can monitor dual channels, you can listen to the general chatter on "4-20" then only transmit on your group channel.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^Download the Baofeng manual from the Chinese Radio Documentation Project. It’s written by an enthusiast and is a million times better than the one that comes with it. Then just program in FRS and GMRS channels. Get the BCA guys to use straight channels only, no CTCSS codes. Or you can program in some CTCSS codes, but you have to make sure the BCA guys use those same channels all the time.