>>2771377A safehouse can conceal you from aerial detection and detection in general, but safehouses can also be raided. The physical underground will conceal you from aerial detection and aerial threats, tunnels and caves, dugouts and natural shelters. Being able to read a topographic map with color coded tree cover is an important outdoor skill, but thousands of caves are simply not charted or even easy to find and access if documented, let alone man-made tunnels, shelters, caches.
Effective guerrillas need to practice light, sound, and signal discipline to evade aerial detection and aerial attacks. Flashlights and campfires can give away a position in the night, as can loud noises and being detected making movements while in tightly packed formations rather than far apart. It is also important to minimize and often completely eliminate wireless signals electronically emitted and tracked by SIGINT.
