Perfectly True!

I removed the NAD27toWGS84 conversion from the script and now the truns match quite good to my real position.

Many thanks for your advise!

Still present are the following problems:

1. gpsapp "looses" contact between actual position and calculated route, the route description goes (without moving my car) step-by-step directly to the end, display says "No route loaded", loading route again is not possible, map of the route is still present - with the new coordinate system its better (occurs not so often) but not solved

Today I tried hard (while driving) to log some data while following the route. My description of the route with empeg display messages is on
http://www.bndlg.de/~fossi/gpslog.htm

An interesting finding was that the reverse route works quite good.

2. Somtimes (as today) gpsapp suddenly hangs up while travelling without any user interaction (just display and moving map), front-keys are blocked, mp3 is still playing, remote works, tuner does not work - after rebooting everything is fine again

Any idea?

Juergen