NorthStar Navigation EXPLORER 657 GPS navigation problems, Fuel consumption problems

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B-2 GPS navigation problems

2-1 No GPS fix or long time to get fix at startup:

aMay occur occasionally if the antenna does not have a clear view of the sky. The satellite positions are constantly changing.

bAntenna cable not connected to display unit.

2-2 657 GPS position different from true position by more than 10 m (33 ft):

a657 in simulate mode. Turn simulate mode off (see section 17-15).

bThe normal error in GPS position will exceed 10 m (33 ft) for about 5% of the time.

cUnder 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).

2-3 657 position different from same position on local charts:

a657 in simulate mode. Turn simulate mode off (see section 17-15).

bIncorrect chart datum. Select the correct chart datum (see section 17-2).

cMap 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 center on boat mode (see section 3-2-1).

2-5 The time or date on satellite window is wrong or off:

aNo GPS fix.

bIn simulate mode. Turn simulate mode off (see section 17-15).

cLocal time offset is wrong (see section 17-13). The Local Time Offset must be changed when daylight saving time starts or ends.

2-6 Autopilot not responding to 657; no NMEA output:

aNMEA output disabled or the required NMEA sentences are not turned on. Check NMEA settings (see section 17-10).

bCheck that the instrument is connected correctly.

2-7 No DGPS fix or loss of DGPS fix:

aTo receive a DGPS fix, WAAS/EGNOS must be enabled or an optional DGPS antenna fitted (see section 7).

bWith WAAS/EGNOS: Boat out of coverage area (see section 7).

cWith WAAS: GPS antenna does not have a clear view of the horizon towards the equator.

bWith beacon DGPS: boat out of range of a DGPS beacon.

B-3 Fuel consumption problems

3-1 Fuel used or remaining seem inaccurate:

a657 is not wired for auto power (see section

18-4).

bIn 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.

cThe Set remaining fuel value must be reset after every refuelling (see section 12-1).

dThe fuel tank may not refill to the same capacity each time due to air pockets.

This is particularly noticable with underfloor tanks.

eFuel transducers wear out over time and should be replaced after every 5000 litres of fuel.

3-2 Flow indicates no fuel or low fuel:

aCheck that the number of engines is set to 1 (see section 17-5).

bCheck 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.

Northstar Explorer 657 Installation and Operation Manual

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Contents Explorer Damage Possible injury or deathCould result in death or serious injury Could result in minor or moderate injuryPage Contents Tides window User card window 15 AIS Installation Other Nmea instruments Installation Northstar petrol/gasoline sensorsIntroduction 657 can use two kinds of plug-in card Cleaning and maintenanceOverview Plug-in cardsReplacing the display unit Changing the plug-in cardRemoving the display unit Turn the display unit off see -2 and put the dust cover onOverview of the keys Using the keysUsing the menus Basic OperationTurning off manually Turning on and off / auto power Turning on manuallyMan overboard MOB Backlight and night modeNight mode To cancel MOB or set another MOBAlarms Simulate mode657 has user settable alarms see section Main windows Page Multi window displays Deleting a favorite display from the list Favorite displaysSelecting a favorite display Adding a favorite display to the listDisplays can show data at the top, called the data header Setting the data header for a displayData header CompassNavigating to a point Navigation ChartGoing to a waypoint or to a point on the chart Introduction to navigatingStarting a route from the routes window Starting a route from the chart windowCancelling a route PreparingLand Sea Cursor see section Typical waypoint see section Chart windowTo go to the Chart window, press then select Chart Typical chart window showsLatitude and longitude Chart modesChart scale Chart symbols and informationProjected course Finding a chart symbolPerspective view Distance and bearing calculatorInterval Track Track 2, 3, 4 or Navigation Highway windowTracks and tracking Time intervals Interval Track Track 2, 3, 4 orWaypoints window Navigation WaypointsMoving a waypoint Displaying a waypoint on the chartManaging waypoints Creating a new waypointSort Waypoints Navigation RoutesDeleting all waypoints Changing a waypoint’s dataCreating a new route Creating a new route from the chart windowRoutes window Managing routesCreating a new route from the routes window Displaying a route on the chartEditing a route from the chart Editing a routeSatellites Satellite window shows UsingSonar fishfinding Introduction Satellite windowStrength of echoes Interpreting the displayDepth Bottom typesFrequency and cone width WaterExample of shadows When to use 50 kHzWhen to use 200 kHz ShadowsWhen to use 50/200 kHz When to use MixedMinute ago Seconds ago Now KHz display 200/50 Khz display Mixed displayFish detection and display Where to find fish Fish symbolsFish arches Zoom range and offset Range657 has two range modes AutoThis display is called the gain window Changing modeGain and threshold Gain windowSonar history display no split Sonar fishfinding DisplaysHistory position bar Extended history modeSonar Zoom and Full Screen Zoom displays Screen. Press to return to the most recent echoSonar 50/200 display Sonar Bottom displayBottom type Setting gain and thresholdSonar A-Scope display Fish recognitionChanging a gauge layout Gauges windowData window Selecting a Gauges layoutFuel window shows Fuel functions and displayWhat the fuel computer does Fuel windowWhen you add or remove fuel Low fuel alarm When you remove fuelBoat speed sensors Water speed and ground speed Speed Log Economy RangeSpeed Log Economy Press twice, then select Fuel Fuel consumption curvesMaking a curve Start running the boat in a straight lineSelecting a curve Using a curveRenaming a curve Deleting a curveSetup engines CalibrationTo the reading of the fuel dispenser’s gauge Then press Choosing the date of the tide chart Tides windowTides window shows data for the chosen date User card window User card window hasSaving data to the user card Rereading the file information 15 AISDeleting a file from the user card Sorting the file namesViewing AIS Vessels Displaying Full AIS Details Safety msgs rxAIS Windows VesselsDisplays Distress Poll 16 DSC/Buddy track windowsDeleting a boat Using the displays Displaying a boat on the chartBoat positions Creating a waypointSetting up Setup option menus SmartCraftTime see Favorites see 17-14 Simulate see Language Setup SystemAuto power off Factory resetPalette Setup ChartSetting map datum RotationMap shift Nmea datum offsetMap shift Applying a map shiftLat/lon grid Digit size Setup SonarPulse power FrequencyDgps Source Setup GPSSetup Fuel GPS SourceNum engines Setup enginesSetup tanks SourceRecord Setup TrackDistance TimeReset engine hours Setup AIS Show Dangerous OnlySetup Logs Reset total distAlarm sounds when it is on Setup AlarmsSymbol Alarm Arrival radius Anchor alarmFuel Setup UnitsTemperature Setup CommsSpeed filter Setup CalibrateTemperature filter SpeedSpeed range Setup TimeSetup Favorites Keel OffsetMode InstallationSetup Simulate SimulateGPS or Dgps antenna For GPS navigation see section Installation What comes withInstallation Options and Accessories Optional sensors and instrumentsDisplay unit 18-3 Black Yellow Blue Power/data cablePin Wire Function ConnectionsThere are two mounting arrangements Installation The display unitFlush Mounting Bracket MountingAuto power Installation Power/data cableBasic power Black Power/data cable Red Yellow Fuse 2AInstallation GPS antenna Selecting an antenna Installing an antennaDgps Source Installation Sonar transducer Installation Northstar petrol/gasoline sensorsBlue Sonar cable Either Installation SmartCraft Installation Other NavBus instrumentsNavBus Installation Other Nmea instruments Installation Northstar VHF radioTilt and rotation for best viewing and hand Installation Setup and testEnter setup data to set up the 657 to your If the display unit is bracket mounted, adjustAppendix a Specifications List of datums Adindan AfgooyeSouth American General problems Appendix B TroubleshootingFuel consumption problems GPS navigation problemsThere is no reading for fuel economy Sonar fishfinding problemsTwin engine installation shows only one flow rate Erratic Fuel Flow readingsBottom is not displayed Bottom is displayed too far up the screenThere is a double bottom trace displayed Glossary Appendix C Glossary and navigation dataNavigation data TBMFT!COUNBSJOFDPN
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