Gps Navigation Problems; Fuel Consumption Problems - NorthStar EXPLORER 650 Installation And Operation Manual

B-2 GPS navigation problems
2-1 No GPS fix or long time to get fix at
startup:
a May occur occasionally if the antenna does
not have a clear view of the sky. The satellite
positions are constantly changing.
b Antenna cable not connected to display unit.
2-2 Explorer GPS position different from
true position by more than 10 m (33 ft):
a Explorer in simulate mode. Turn simulate
mode off (see section 17-14).
b The normal error in GPS position will exceed
10 m (33 ft) for about 5% of the time.
c Under special circumstances the US
Department of Defence may introduce a
deliberate and changing error in the GPS
positions of up to 300 m (1000 ft).
2-3 Explorer position different from same
position on local charts:
a Explorer in simulate mode. Turn simulate
mode off (see section 17-14).
b Incorrect chart datum. Select the correct
chart datum (see section 17-2).
c Map shift has been applied wrongly. Clear
map shift, then reapply if necessary (see
section 17-2).
2-4 Can not see boat on chart:
Press to switch to centre on boat
mode (see section 3-2-1).
B-3 Fuel consumption problems
3-1 Fuel used or remaining seem inaccurate:
a Explorer is not wired for auto power (see
section 18-4).
b In rough seas, fuel may surge back and forth
through the fuel transducer, resulting in
incorrect readings. Try installing a one-way
valve between the fuel transducer and the
fuel tank.
c The Set remaining fuel value must be
reset after every refuelling (see section 12-1).
d The fuel tank may not refill to the same
capacity each time due to air pockets.
82
2-5 The time or date on satellite display is
a
b
c
2-6 Autopilot not responding to Explorer; no
a
b
2-7 No DGPS fix or loss of DGPS fix:
a
b
c
b
e
3-2 Flow indicates no fuel or low fuel:
a
b
Northstar Explorer 650 Installation and Operation Manual
wrong or off:
No GPS fix.
In simulate mode. Turn simulate mode off
(see section 17-14).
Local time offset is wrong (see section 17-12).
The Local Time Offset must be changed
when daylight saving time starts or ends.
NMEA output:
NMEA output disabled or the required NMEA
sentences are not turned on. Check NMEA
settings (see section 17-10).
Check that the instrument is connected
correctly.
To receive a DGPS fix, WAAS/EGNOS must be
enabled or an optional DGPS antenna fitted
(see section 7).
With WAAS/EGNOS: Boat out of coverage
area (see section 7).
With WAAS: GPS antenna does not have a
clear view of the horizon towards the equator.
With beacon DGPS: boat out of range of a
DGPS beacon.
This is particularly noticable with underfloor
tanks.
Fuel transducers wear out over time and
should be replaced after every 5000 litres of
fuel.
Check that the number of engines is set to 1
(see section 17-5).
Check that the fuel cable connectors are
securely plugged in and the collar is locked
in place. The collar must be locked in place to
give a watertight connection.