This tool allow you to locate you position in relation with other GPS points, to see the journey you have travelled.
You can find back your place at harbour after a trip on boat, start point of an excursion, your car in a huge carpark,
A place which you know location,
To see the excursion have made,
Speed trap alert or lot of other things...
Tracks and saved points can be exported to GoogleEarth.
Put your old tracks in background with a system of tracing,
Put maps in background (moving map),
Display graphic of altitude, speed or signal level.