Furuno NAVNET 1833 - Manual (Page 109)

3. PLOTTER OPERATION
3-23
Erasing all own ship track
1. Press the [MENU] key followed by the CHART SETUP, TRACKS & MARKS
CONTROL and ERASE T & M soft keys to show the ERASE menu.
2. Use the trackball to select ERASE ALL TRACKS, then press the EDIT soft
key.
3. Push the [ENTER] knob to erase all own ship track.
4. Press the [MENU] key twice to close the menu.
Erasing all target tracks
1. Press the [MENU] key followed by the CHART SETUP, TRACKS & MARKS
CONTROL and ERASE T & M soft keys to show the ERASE menu.
2. Use the trackball to select ERASE TARGET TRACKS, then press the EDIT
soft key.
3. Push the [ENTER] knob to erase all target tracks.
4. Press the [MENU] key twice to close the menu.