Quote Originally Posted by gone fishin' View Post
done what you said and noticed there were 30 saved tracks on same day with 21835 points each, oops...I bet that track is on sd card & every time unit is turned on it loads. Will format sd.
thanks much for the tips.
Waypoints, routes, and tracks are "saved" into the internal memory of the unit....they will not be removed from the unit memory unless you go into the Menu system under the Nav tab and delete them manually...

It is unlikely that these tracks are residing on your SD card unless you manually exported them from the unit memory onto the SD card...

Nonetheless, it is very possible that these tracks in the unit memory is causing erratic behavior in your chart views...

Go into the unit Main Menu system....
Cursor over to the Nav tab...

Under the Nav tab ...delete all "saved" tracks you don't need and "clear" any current track (if there is a current track)...

It is a good idea to manually remove these tracks at the end of every fishing day

Rickie