How to pass your land nav course: a system, not talent
Land nav fails more candidates than any other field event — and almost always for the same five reasons. Pace count, plotting discipline, attack points, aiming off, night navigation, and a two-week practice plan that works in any park.
Read the guide → 18 JUL 2026What is viewshed analysis? See what you can see from anywhere
A viewshed shows exactly which terrain is visible from any point — the ridge-top view without the climb. How the algorithm works, what hunters, ham operators and SAR teams use it for, and the honest limits of 30-meter elevation data.
Read the guide → 18 JUL 2026TAK on iPhone: set up a free OpenTAKServer in an afternoon
Live team positions on everyone's map, with the free open-source TAK server: install on a cheap VPS or Raspberry Pi, open four ports, enroll your iPhone with one QR scan — plus the firewall mistakes that cause 90% of failed connections.
Read the guide → 18 JUL 2026How to read MGRS coordinates in 5 minutes
The Military Grid Reference System looks cryptic — 33T XJ 65490 44120 — until someone walks you through its four parts. Here's the whole system, from grid zones to 1-meter precision, with the mistakes everyone makes once.
Read the guide →Next up: offline map apps for iPhone, compared honestly.