I had shelved the defensive plans for a while and was going over subspace theory. My math was a little rusty, but I was able to follow it. The theory had only been published a couple of years ago and hadn’t been fully explored yet. Once the possibility of the SURGE drive had been identified, almost all research had been focused in that direction. SUDDAR, the ability to use subspace pulses to detect and identify nearby concentrations of matter, was an almost trivial corollary.