Drill Replay

Quick start

Review a lab in four steps

Set up your units. In the Units tab, name your levels and build the tree, or paste your roster in the Data tab as Name | Position | Unit path.
Collect tracks. Cadets record with OsmAnd and upload their GPX file through your university Form. Download the folder of responses as a ZIP.
Import. Drop the ZIP or GPX files on this page, or use Import in the Data tab. Files are matched to cadets by name; fix any that aren't.
Replay. Press play, color by echelon, tap a cadet for details, and add objectives, ORPs and phase lines in the Marks tab. If some phones recorded before or after the lab, set the start and end under Exercise time in the Data tab. A dashed outline means that phone had no GPS fix at that moment.

Keyboard shortcuts

SpacePlay or pause← →Back or forward 10 seconds (hold Shift for 1 minute) Home / EndJump to start or end+ / −Zoom in or outFFit everyone on screen EscStop placing marks or close this panelDeleteRemove the selected mark (Marks tab); Ctrl+Z puts it back[ ]Set the exercise start or end to the current timeTab to mapThen arrow keys pan (Shift for bigger steps) and Enter selects the nearest cadet

Your data

Everything stays in this browser. GPX files are read on your computer and are never uploaded. Nothing is kept after you close the page: the roster, units, tracks and marks all clear. Use Save setup file or Copy setup in the Data tab to keep a roster for next time. Display settings are remembered in this browser for up to 8 hours, then cleared.

Credits

Free for non-commercial training use. Satellite and close-up topo maps by Esri (non-commercial use). Topo maps and best-available elevation by USGS The National Map and 3DEP (public domain). Backup elevation from AWS Terrain Tiles. ZIP reading by JSZip. Grids are WGS84 MGRS. Symbols are simplified control measures, not the full MIL-STD-2525 set. Version .