Hello Jockel,
1) when I use the XY diagram the old trace displays with the new one on top. If I have loaded 4 tracks previously I now have 5 profiles. This is a mess to use! Even when I delete the previous traces from the "Tracks" directory they remain in the XY Diagram!
The only way I get clean profiles is to close QV4 and restart for each new trace.
How do I get out of this?
2 I think I saw once "recalculate speed" for a trace but I can't find it. For some reason traces now display neither speed nor heading (both at 0 for all records)
Thanks for yr customary precise help.
Pierre