Had a mild dispute on whether we were overlapped at last Beercan, and wanted to check the track to see if we were actually at the 3 Boat length point before we gybed. 

I can plot the track, and know where the mark is by the turning radius, and can set a range circle that represents boat length in nm.

Question is whether the "track" is the calculated bow (offset from GPS) or the GPS (on stern rail).and in a log file the position is raw or corrected?