(Continued from Part 2. This concludes the article.)
Without suitable commo, an extended and layered defense is less possible, or less effective. Lacking the ability to coordinate with a small community diminishes the ability to perform job number one: security. While Ham radio is a good thing when we need to talk far and wide, it is commo with our neighbors will be more important to us. At the very least, buy a Slim Jim (not a j-pole) from KB9VBR, or any omnidirectional antenna that is tuned for GMRS, or 464.500 Mhz. With that, you can for sure talk to neighbors up to a mile away on a Baofeng UV-5R as a sort of base station for the neighborhood. By ordering a Slim Jim from a small shop, we can specify a center frequency of 464.500, for GMRS. Use only FRS/GMRS channels 1-7, and 15-22 to talk on this antenna. GMRS/FRS radios are almost ubiquitous. I would also buy a box full of the least expensive GMRS/FRS to hand out, such as these: Cobra FRS/GMRS 16-Mile CX112 2 Way Radio Long Range Walkie Talkie.
Brevity Codes
Because GMRS handheld transceivers are literally everywhere, COMSEC (Communication Security) could be a real problem. Undisciplined traffic should be kept on the FRS channels 8 thru 14 because the ERP (read: actual power out) is limited to no more than 1/2 watt. The use of scramblers is illegal on GMRS, but there are older models of Midland Extra Talk, models that begin with the MXT designation in the model numbers that came with a scramble feature. After a decade, the FCC finally discovered what Midland offered, and ordered this feature to be withdrawn. It was illegal. The early MXT handheld models also transmitted with 3.5 watts, which is over the legal limit. A low power transmission that is also scrambled adds a layer of security and improves COMSEC within a community that does not otherwise have the ability. However, these older Midland transceivers were and are popular with hunters and are still out there. The use of brevity codes would be wise addition to your Signal Operating Instructions (SOI).
I refer to the excellent article by ShepherdFarmerGeek as a good source on this topic.
We can use simple encryption as recommended for most of our radio traffic, or we can use sophisticated digital encryption for sensitive traffic, yet no encryption, except a One Time Pad (OTM), is actually secure. We can buy a One Time Pad generator from Ready Made Resources, but many of us can only afford a manual version. Regardless, most persons will not be up to the challenge of using complicated codes, and sophisticated equipment, even if they could afford it. Therefore a brevity code that is not only easy to use is the best choice, and is also adequate security for a low-power community radio net.Continue reading“Communications: Bringing People Together – Part 3, by Tunnel Rabbit”
