and then: send the whole data everytime the boat gets in range of the base (pitlane)
Oh, something I learned from the first walkabout with the unit in hand: when the GPS data is writen very often but the unit is stationary: this may bloat the datafile. Should a mechanism that checks for changes (and if none, don't write) be included? If the only thing that changes is the timestamp, there's no point in filling the datafile. Might enable us to leave the unit on the whole time (before and after the actual run there's always a lot of waiting) and not have to add a startlog/stoplog button or so in the cockpit.