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3.5 Navigation Data Source
The NAV SOURCE SETTINGS menu mainly selects the source of nav data. For navigator
other than the FURUNO GP-310B/GP-320B, speed averaging and local time offset (to use
local time instead of UTC time) are also available from this menu.
1. Press the [MENU] key followed by SYSTEM CONFIGURATION, NAV OPTION and NAV
SOURCE SETTINGS soft keys to show the NAV SETUP menu.
NAV
SETUP
RETURN
EDIT
POSITION SOURCE
ALL
SPEED AVERAGING*
0000
LOCAL TIME OFFSET*
+00:00
TEMP CALIBRATION
+00 F
DEPTH CALIBRATION
+00 ft
* For GPS receiver other
than GP-310B/GP-320B.
Nav setup menu
2. Select POSITION SOURCE and press the [EDIT] key or [ENTER] knob to show the
position source window.
3. Select FURUNO BB GPS, GP, LC or ALL as appropriate and press the [ENTER] knob or
ENTER soft key.
FURUNO BB GPS: GPS Receiver GP-310B/GP-320B
GP: GPS navigator (via NETWORK or DATA 1 connector)
LC: Loran C (via NETWORK or DATA 1connector)
ALL: Multiple navaid connection (via NETWORK or DATA 1connector)
4. For GPS receiver other than the GP-310B/GP-320B, you may adjust speed averaging
and use local time.
a) Choose desired item and press the EDIT soft key.
b) Use the cursor pad to select location and rotate the [ENTER] knob to set value. For time, use
the +< - -> - soft key to switch from plus to minus and vice versa.
c) Press the ENTER soft key.
Speed Averaging: Calculation of ETA is based on average ship’s speed over a given period. If
the period is too long or too short calculation error will result. Change this setting if calculation
error occurs. The default setting, 60 seconds, is suitable for most conditions. The range of
adjustment is 0-9999 (sec).
Local Time Offset: GPS uses UTC time. If you would rather use local time enter the time
difference between it and UTC. The range of offset is –13:30 to + 13:30 and the default setting is
zero (no offset).
Temp Calibration: Offsets NMEA water temperature data. The range of adjustment is -40°F to
+40°F.
Depth Calibration: Offsets NMEA depth data. The range of adjustment is –15 to 90 ft.