Furuno GP-3300 - Manual (Page 112)

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11.13 Selecting Navaid
Navigation data can be fed from the internal GPS receiver (GP-3300
only) or external navigator. The default navaid setting for the GP-
3300 is the internal GPS receiver.
To select an external navaid;
1. Press [MENU] and [8] to display the INITIAL SETTING menu.
8 INITIAL SETTINGS
PAGE CHANGE (TO GPS INITIAL SETTINGS)
INTERNAL NAV = ON OFF
EXTERNAL NAV = GPS LC LA DC DR OFF
I/O DATA FORMAT = CIF NMEA183 NMEA180/182
Figure 11-23 INITIAL SETTINGS menu, first three items
2. Select OFF from the INTERNAL NAV field.
3. Select the EXTERNAL NAV line.
4. Select navigator desired: LC, Loran C; LA, Loran A; DC, Decca;
DR, Dead Reckoning.
5. Press the [ENT] key.
Note: If both internal and external GPS receivers are selected on the
GP-3300, position data from the internal receiver will be used to fix
position.