Humminbird 363 manual Display Problems, Problem Possible Cause, Or faulty

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Display Problems

There are several main conditions or sources of possible interference that may cause problems with the quality of the information displayed on the control head. Look in the following table for some symptoms of display problems and possible solutions:

Problem

Possible Cause

The control head loses If the power output of your boat’s engine is

power at high speeds. unregulated, the control head may be protecting itself using its over-voltage protection feature. Make sure the input voltage does not exceed 20 Volts.

When the boat moves at higher speeds, the bottom disappears or suddenly weakens, or the display contains gaps.

The transducer position may need to be adjusted. A mix of air and water flowing around the transducer (cavitation) may be interfering with the interpretation of sonar data. See your Installation Guide for suggestions on adjusting the transducer position.

Electrical noise from the boat’s engine may be interfering with sonar reception. See Finding the Cause of Noise for more information.

There are no fish detected, even when you know they are in the water under the boat, or sonar readings seem weak

or faulty.

Sonar readings may be affected if the transducer is not positioned correctly (i.e. mounted at an angle, not straight down), or there is some kind of mechanical interference, either because it is mounted inside a hull that is too thick for proper sonar transmission, the bond between the transducer and the hull is not airtight, or because the transducer is dirty. Check with your Installation Guide for guidance on re-positioning the transducer, and make sure the transducer is clean.

Low battery voltage may be affecting the power of signal transmission.

Electrical noise from the boat’s engine may be interfering with sonar reception. See Finding the Cause of Noise for more information.

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Contents GPS Chartplotter Operations Manual Thank You Table of Contents Iii Key FunctionsSonar Menu Tab Chart Menu Tab Specifications Glossary How Sonar Works Peak to Peak measures power output at the highest points How GPS and Cartography Work DualBeam Plustm SonarPage Bait Ball Hard Bottom Rocky Bottom What’s On the DisplayAdjacent to your boat, including the following items 83 kHz, Wide Beam Hollow Fish SymbolSonar View Zoom View Chart ViewViews Sonar viewsSonar View Sonar ViewReal Time Sonar RTS Window Understanding Sonar HistoryBottom Presentation Freeze FramePage Sonar Zoom View Sonar Zoom View200/83 kHz Split Sonar View 200/83 kHz Split Sonar ViewBig Digits View Big Digits ViewCircular Flasher View Bird’s Eye View Bird’s Eye ViewChart View with Active Cursor Chart ViewChart View without Active Cursor Combo View Combo ViewView Orientation Introduction to Navigation Chart View with Cursor PresentViewing Cartography Waypoints, Routes and Tracks Waypoints, Routes and TracksSave, Edit, or Delete a Waypoint Navigate to a Waypoint or Position Add a Waypoint Target or Trolling Grid Navigation X-PressTMmenuSave, Edit or Delete a Route Edit, Delete or Hide Saved Tracks Save or Clear a Current TrackInfo Key POWER/LIGHT KeyKey Functions View KeyWAY Cursor Control Key Menu KeyExit Key Mark KeyGoto Key Zoom +/- KeyPress TM Menu Powering Up the UnitMenu System Title ScreenSonar Tab Normal Mode Advanced Mode Normal Simulator System Status Start-Up Options MenuNormal Operation Simulator SimulatorSystem Status System Status Self Test Screen Accessory TestSystem Status Accessory Test Screen Self TestGPS Diagnostic View GPS Diagnostic ViewSonar X-PressTMMenu Sonar X-PressTMMenuSonar views only Sensitivity at Low Sensitivity at Medium To adjust the SensitivitySensitivity Highlight Sensitivity on the Sonar X-PressTMmenuUpper Range To adjust the Upper RangeHighlight Lower Range on the Sonar X-PressTMmenu To adjust the Lower RangeLower Range Bottom View Chart SpeedTo adjust the Chart Speed To adjust the Bottom ViewTo turn on Bottom Lock To adjust the Bottom RangeBottom Range Bottom LockOnly when Navigating Cancel NavigationTo Cancel Navigation Highlight Cancel Navigation on the Sonar X-PressTMmenuNavigation X-PressTMMenu Navigation X-PressTMMenuNavigation views only Waypoint Submenu contains the following menu choices Waypoint NameTo view the Waypoint Name Submenu Highlight WaypointName on the Navigation X-PressTMmenuClear Current Track Cursor to WaypointSave Current Track To Skip Next Waypoint Save Current RouteSkip Next Waypoint To Save Current RouteOnly if a Target is Active Highlight Cancel Navigation on the Navigation X-PressTMmenuRemove Target To Remove a TargetTo Set the Size of the Sonar Window in the Combo View Remove GridSonar Window To Remove a GridWaypoint Name Submenu Most recently-created waypointSonar Menu Press the Menu key twice to access the Main MenuSonar Menu Tab Sonar tabHighlight Beam Select on the Sonar main menu Beam SelectTo use Beam Select Transducer Cone and Fish Arches Fish ID+TMTo turn Fish ID+TM on or off Highlight Fish ID Sensitivity on the Sonar main menu To change the Fish ID Sensitivity settingTo change the RTS Window setting Fish ID SensitivityHighlight Zoom Width on the Sonar main menu To change the Zoom Width SettingZoom Width KHz SensitivityDepth Lines To change the Depth Lines settingDepth Lines Surface Clutter To change the Surface Clutter settingSurface Clutter Max Depth To change the Noise Filter settingTo change the Max Depth setting Noise FilterWater Type To change the Water Type settingNavigation Menu Tab Navigation Menu TabNavigation tab Highlight Current Track on the Navigation main menu Current TrackCurrent Track allows you to view the Current Track submenu To view the Current Track SubmenuHighlight Saved Tracks on the Navigation main menu Saved TracksSaved Tracks allows you to view the Saved Tracks submenu To view the Saved Tracks SubmenuHighlight Waypoints on the Navigation main menu WaypointsWaypoints allows you to view the Waypoints submenu To view the Waypoints SubmenuRoutes Submenu contains the following menu choices RoutesTo view the Routes Submenu Highlight Routes on the Navigation main menuGrid Rotation Chart OrientationNorth Reference Track Min Distance To change the Trackpoint Interval settingTo change the Track Minimum Distance setting Trackpoint IntervalMap Datum To change the Map Datum settingTo Delete All Navigation Data To change the Course Project Line settingCourse Projection Line Delete All Nav DataChart Menu Chart Menu TabMap Borders Chart Detail LevelTo change the Chart Detail Level setting Highlight Chart Detail Level on the Chart main menuSet Simulation Position To change the Map Borders settingTo change the Lat/Lon Grid setting Lat/Lon GridTo Clear Map Offset To change the Map Offset settingSet Map Offset Clear Map OffsetAlarms Menu Alarms Menu TabTo change the Fish ID Alarm setting Depth AlarmFish ID Alarm To change the Depth Alarm settingTo change the Temp Alarm setting Low Battery AlarmTemp Alarm To change the Low Battery Alarm settingTo change the Arrival Alarm setting Off Course AlarmArrival Alarm To change the Off Course Alarm settingTo change the Alarm Tone setting Drift AlarmAlarm Tone To change the Drift Alarm settingSetup Menu Tab Setup Menu TabUnits Distance Units DepthUnits Temp Language User ModeUnits Speed To Restore Defaults Triplog ResetRestore Defaults To Reset TriplogSelect Readouts Default Sonar ViewSelect Readouts Advanced, Sonar view onlyTemp Offset To change the Depth Offset settingTo change the Temp Offset setting Depth OffsetTo change the Local Time Zone To change the Speed Calibration settingSpeed Calibration Local Time ZonePosition Format To change the Daylight Saving Time settingTo change the Position Format setting Daylight Saving TimeTo change the Date Format Time FormatDate Format To change the Time FormatTo turn Nmea Output on or off Nmea OutputTo turn Sonar on or off SonarTo Change the View Status of Any View Views Menu TabSeriesTM Defaults to Simulator with a Transducer Attached TroubleshootingOr faulty Display ProblemsProblem Possible Cause Cavitation from Finding the Cause of NoiseIsolation Boat’s engineSpecifications Sonar Terms GlossaryPage Image Update Page Page Receiver See Transmitter Page Page Page GPS & Navigation Terms 101 102 103 104 105 106 107 108 109 Contact Humminbird