Plan a Route

Lock the entrance when you start a caving workout (GPS, and north if you can), and with no line recording the cave screen becomes the Navigator: the lines tied to this entrance, the entrance (ENT) and your live position. Nothing is recorded until you start a Cave Line. With GPS but no north it works in the trip frame, with no bearings. A workout with no entrance GPS, or a resumed one, shows your lists instead.

Across the top: Guide Lines, Measure, 2D/3D, Layers and the torch, with the compass top right. Along the bottom: the readout on the left (the XYZ widget above it in 3D), then Follow, Snap and Go on the right. Follow centers the map on you; tap it again once centered (2D, north locked) to switch heading-up and north-up. The hike map uses the same layout. Every button is in the Icon Directory.

Every line starts off, so a cave with ten lines doesn't crowd the screen. Open Guide Lines and switch on the ones you want. Lines you record on the trip stay on, and picking a station on a hidden line for Go or Snap switches that line on.

Tap Go (the scope, bottom right) and pick a station, the entrance or a datum. The list is grouped by line, with search and Sort (By line or Nearest). The chip under the compass shows the target and how far it is: tap it to stop, or tap Go to pick another.

SpeleoMap finds the shortest way along the survey, across every line that is on. Lines join only at stations and line ends (within about 2 m level and 1 m height), so a route never cuts through rock between two passages that only pass close. The route is drawn bold and the lines it doesn't use turn gray. Off the survey, a white ring marks where to rejoin it; nothing is drawn off the survey. It follows the recorded waypoints and never jumps a gap in a line wider than 3 m.