LAND NAV | Terrain Walk — Interactive Land Navigation Course (16 Modules)

Everyone gets handed a map and a protractor and told to figure it out. This is the part nobody teaches.

Terrain Walk is not a PDF and not a video course. It is a working land navigation trainer that runs in your browser. You drag a real protractor across a real grid. You shoot an azimuth on a lensatic compass that clicks. You plan a leg with a handrail, a backstop and an attack point, and the course scores your choices before you ever walk it. When you plot a point, you get graded in meters — right and up — not told "close enough."

Five phases, sixteen modules

Phase 1 — Read the map. How a map talks, colors and marginal information, layer study on a live sheet. Scale: 1:50,000 against 1:24,000 on identical ground. Contours and the ten terrain features, with a drill mode and a terrain profile cutter. Ordering your own gridded sheet at both scales.

Phase 2 — Plot and measure. MGRS grid reader and a plotting drill graded in meters. A draggable GTA 05-02-012 protractor, including the wrong-scale error demonstrated on purpose so you recognize it. Pace count calculator, distance bench and bead counter.

Phase 3 — The compass. Azimuths and the three norths, a declination diagram and a timed conversion drill. A full lensatic simulator with night mode and the three-degree click bezel. A Suunto MC-2 with a working declination setting.

Phase 4 — Move. Handrails and backstops, with a leg planner that scores yours. Time as a backstop: planning figures, the stop-time rule, a running clock. Leg card builder, box method walkthrough, deliberate offset calculator.

Phase 5 — Confirm and build. Confirming with GPS: latitude and longitude to MGRS, and a commit-then-confirm discipline drill. Design your own course with point quality scoring and a safety brief. Final evaluation: a twenty-question written exam drawn at random plus a five-point plotting practical.

Appendix. Numbers to memorize, compass safety distances, a thirty-term glossary, and the sources.

The ground

Every map is generated in your browser from one terrain model — the Buckner Ridge Training Area. Six thousand by four thousand five hundred meters, MGRS 17S QE, high ground at Hill 412. Contours come from marching squares over a sixteen-meter sample grid. Streams come from a real D8 flow accumulation over the same surface, so drainage runs where the terrain says it should. Both scales draw the same ground at the correct contour interval — 20 meters at 1:50,000, 20 feet at 1:24,000.

Nothing in it is a screenshot of a copyrighted sheet. All of it is generated.

Built on the doctrine

TC 3-25.26, Map Reading and Land Navigation. ATP 3-21.18, Foot Marches, for the movement rate figures. The Suunto MC-2 guide and the NOAA magnetic field calculator for declination. The three figures the internet usually gets wrong were checked against the source text: degrees are on the inner scale of the protractor, a doctrinal pace is one step, and deliberate offset moves you about 18 meters per degree per 1,000 meters.

How you get in

This is browser access, not a download. After you check out, go to Terrain Walk — Land Navigation Course | Run Lift Perform and type the same email address you used at checkout. That is the entire process — no account, no password, no app. Your browser stays unlocked for sixty days at a time, and access does not expire. Use the same email on your phone and it unlocks there too.

Progress and exam scores save on the device you study on. Once the page has loaded, everything runs in the browser — you do not need a signal in the field.

This is a training aid. It does not replace supervised field practice.