Furuno RP180 - Manual (Page 17)

2. CHART CARDS
2-6
2.3.2 Bearing correction
In some cases radar bearing may not match chart bearing. This can be corrected by
offsetting bearing, automatically or manually. This feature is useful when no coastline is
displayed; that is, vessel is in mid ocean. A magnetic compass is required.
1. Press [MENU], [8], [8], [5], [5] to display the Position Correction menu.
2. Press the [4] key to choose Manu., and press the [ENTER/SELECT] key.
3. Press the [5] key to choose Manual Entry, and press the [ENTER/SELECT] key. The
menu disappears and the prompt “Rotate chart data by using VRM/EBL knob, and press
ENT.” appears.
4. As the prompt says, use the EBL or VRM knob to rotate chart data.
5. Press the [ENTER/SELECT] key. Control is returned to the Position Correction menu.
6. Press the [MENU] key to close the menu. The offset icon ( ) appears at the bottom of
the display.
To remove the bearing offset, choose Off at step 2 in the above procedure.