Furuno GP-1650 - Manual (Page 26)

3-4
3.6 Erasing All Track
You can erase all track. Be absolutely sure
you want to erase all track; erased track can-
not be restored.
1. Press the [MENU] key followed by the soft
keys CHART SETUP OPTIONS and
TRACK CONTROL.
2. Press the soft key ERASE TRACK. You
are asked if you sure to erase all track.
3. Press the [ENTER] key to erase, or press
the [CLEAR] key to escape.