REQUIRES CUSTOM HARDWARE — this data field does nothing on its own. It is the display for an open-source, board-mounted jump sensor for wing foiling (a small BLE motion puck you build yourself; hardware and firmware at the project repository). With the sensor mounted: see each jump's height seconds after you land, plus session jump count and session best, live on your data screen. No phone in the loop — the sensor talks straight to the watch. Jump count, best height and best airtime are also written into the saved activity as FIT developer fields, along with the watch's own barometric altitude and pressure. Without the sensor, the field will show "finding puck" indefinitely — do not install unless you have the hardware. Free and open source. Feet or meters follows your watch settings.

1.0.2 — the wrist now shows THIS activity's jump count and session best, taken from the moment you start the activity timer, instead of the sensor's stored total (which persists until the sensor is cleared and could show a best from an earlier day). The saved activity also carries a small health block from the data field itself — memory in use, sensor link state, seconds since the last sensor message, and an error code — so a problem on the water can be diagnosed from the file. No change to permissions. 1.0.1 — the saved activity also carries the watch's own barometric altitude and pressure as FIT developer fields (baro_alt_m, baro_pa, baro_src).