Compass Triangulation

The Problem It Solves You can see something — smoke on a Ridgeline, a distress flare, a downed aircraft, an animal, a suspicious vehicle — but you can't reach it, and "somewhere over that way" isn't a location anyone can act on. If you and a teammate (or you, moving between two spots) can each take a compass bearing toward the same thing, the point where those bearings cross is its location. This is classical resection, the same technique search-and-rescue teams, surveyors, and foresters have used for decades — Compass Triangulation just does the trigonometry, the mapping, and the reporting for you, in the field, on your phone. Getting Started 1. Set Your Magnetic Declination Your compass points to *magnetic* north; maps and GPS coordinates use *true* north. The gap between them — declination — varies by location and drifts over time, and it has to be corrected for or your bearings will…