Why Subterranean Changes the Equation
Every form of electronic warfare
operates in the air.
We don't.
The entire apparatus of electronic warfare, jamming, direction-finding, signal intelligence, spectrum monitoring, is built around one assumption so fundamental it's rarely stated: communication signals travel through air. That assumption is correct for every communication system currently in existence. Radio waves travel through air. Satellite signals travel through air. Even encrypted systems are just encrypted air-signals.
Jam the air in an operational area and you jam everything. Electronic warfare systems are extraordinarily effective at this. Broadband jammers don't need to know your frequency, your encryption, or your protocol. They just fill the air with noise until nothing gets through. Direction-finding equipment doesn't need to break your encryption. It just follows the signal to the source.
One Island's Subterranean domain research is built around a fundamental counter: what if the communication never entered the air at all? Certain low-frequency signals propagate through soil, rock, and earth with usable range. The earth itself becomes the medium. A signal traveling through ground is physically separated from the air where every jamming system operates. Not shielded. Not encrypted against jamming. Separated. The jammer and the signal aren't in the same medium. They can't interact.
The operational implication: a subterranean communication network is immune to electronic warfare by the laws of physics, not by the cleverness of its engineering. That's a different category of protection entirely. T3E97 communications traveling through earth conduction carry the same encrypted voice architecture as every other domain, but the transmission medium makes the electronic warfare question irrelevant.
