Guides, reference packs, and open tools authored by S2 Underground — distinct from military doctrine manuals (which S2 references) and from episodic series videos.
Military manuals on this site are doctrine S2 references (browse manuals). This section is for material S2 produces. PDF guides use the same searchable page-image + text pipeline as manuals (open on this site, full-text in Search). Open data packs and video field guides link out to GitHub / YouTube.
Field guide for GhostNet: a collection of communications networks that let users exchange information without relying on pre-established infrastructure. Intended to ease radio into everyday use and promote off-grid information sharing — not merely an emergency plan.
Read on site Details PDF download GitHub
Searchable on this site · 50 pages · same pipeline as mil manuals
All ArcGIS mapping layers published as KMZ, updated daily. Companion geospatial product from S2 Underground for open use alongside reporting and analysis.
Channel field guide on programming encrypted radios, with a companion basics episode. Not a GitHub PDF pack; published as long-form video instruction.