NC Scout at American Partisan has written an article on signals intelligence and how to exploit it to disrupt an enemy’s communications. Please note that disrupting someone’s radio communications during peacetime is usually illegal. The FCC can fine you thousands of dollars, revoke any radio licenses you have, and confiscate your radio equipment.
Not too long ago I ran a short post over at Brushbeater noting a story from the Marine Corps, pairing signals collection guys with Scout Snipers in a somewhat new small unit strategy. Building on the successes SOF units have had for a long time now in recognizing the rapid value of SIGINT in the field, pairing the two elements only makes sense. The idea is to isolate a target where they’re most vulnerable- electronic communications- in order to end the fight quickly with as few casualties on our side as possible. And working from a prepared citizen’s point of view, those same capabilities can and should be reflected in your own training.
It’s not enough to simply have a scanner, however nice it might be, and call yourself good on signals intelligence. Situational awareness, maybe, maybe, but none of it will do you much good without a means to exploit what ever it is you’ve collected.
The purpose of intelligence is exploitation.
What that means in practical terms is that unless I can do anything with what I’m hearing, its completely useless to me. So what if I hear some traffic on a random frequency. Did I take the time to record it? What did they actually say? What is their level of training or discipline? Who’s the person in charge on the mic?
We can listen to all the traffic we want, but if we have no way of exploiting that, then we’re wasting our time.
Some of the equipment you’ll need for a signals collection package at the small unit level includes a decent scanner capable of decoding P25, a communications receiver, an inexpensive analog radio, a recording device, a Yagi, and a frequency counter. Most of the higher end scanners on the market have up-gradable firmware that is enabling the decoding of P25 modes in use with public service as well as DMR which is very common today in the US as well as being used in Ukraine and Syria among guerrillas. A communications receiver, while similar to a scanner, will tell us the exact frequency the traffic is on, unlike most digital scanners today. We need to know this in order to have the operating frequency- its not enough to know what they’re saying, but we need to know what frequency they’re on so that if we decide to shut down their communications, we can effectively attack.
Our inexpensive analog radio enables us to not just have additional redundancy in our kit, but it’s also a useful exploitation tool. Depending on what type of gear your opponent has, something like a UV-5R can become our weapon in shutting their communications down. Using a Yagi to first get a bearing on their direction and then focus our signal in their direction, overloading their radios. This is beginning what’s known as isolating the target…