Humminbird 161 manual

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Pixels, Vertical: Vertical Pixels are a number of vertical picture elements in a single column on an LCD display. A greater number of vertical pixels provide finer resolution of targets detected by sonar. Essentially, a vertical distance (the depth), when divided by a larger number, breaks that distance into smaller samples, each representing a smaller area and thus providing more detail. In fishfinders, vertical pixels are more critical than horizontal pixels because the horizontal axis of the display represents time, or history. Sonar information on the horizontal axis can vary greatly, depending on boat speed and the Chart Speed setting. A greater number of horizontal pixels show more sonar history that the boat has passed through. On many models, Humminbird® provides the most vertical pixels to provide a better display resolution. See Chart Speed and Pixels.

Power Output: Power output is the amount of sound energy emitted into the water by the sonar transmitter. Power output is measured using either RMS (Root Mean Square) or P-T-P (Peak-to-Peak) measurement systems. Either method is acceptable, but it is important, when comparing power outputs, to make sure that the same measurement system is being used for both outputs, because P-T-P numbers are 8 times higher than RMS numbers. Greater power output allows the sonar signal to penetrate through weeds and thermoclines, reach deeper depths and operate more effectively in noisy environments, such as when the boat is running at high speed.

Pulse Width (Pulse Length): Pulse Width is the length of time that a sonar sound burst is transmitted into the water. Shorter pulse widths provide better target separation, but cannot travel to great depths. Longer pulse widths provide better depth penetration, but result in poorer target separation. Humminbird® varies pulse width based on depth to optimize both target separation and depth performance. See Target Separation.

QuadraBeamTM: QuadraBeamTM is a Humminbird® sonar configuration that uses four sonar beams for a more detailed bottom image. QuadraBeamTM uses the DualBeam PLUSTM configuration for downlooking, and also adds two additional beams to look to the left and right. The sonar beams pointing to the left and right provide the ability to spot fish and structure over a wide 90° area, and to identify on which side of the boat they are located. See DualBeam PLUSTM.

Quick Disconnect Mount: The Quick Disconnect Mounting system is an exclusive Humminbird® feature that permits the unit to be easily removed from the mounting base by pressing a release button, and re-installed by simply snapping it back into

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Contents GPS Chartplotter Operations Manual Thank You Table of Contents Iii Key FunctionsSonar Menu Tab Chart Menu Tab Specifications Glossary Contact Humminbird 103 How Sonar Works Peak to Peak measures power output at the highest points How GPS and Cartography Work Single Beam SonarPage Bait Ball Hard Bottom Rocky Bottom What’s On the DisplayAdjacent to your boat, including the following items Structure where fish may be hidingSonar View Zoom View Chart View Big Digits ViewViews Sonar viewsSonar View Real Time Sonar RTS Window Understanding Sonar HistoryBottom Presentation Freeze FramePage Sonar Zoom View Sonar Zoom ViewCircular Flasher View Big Digits ViewBird’s Eye View Bird’s Eye ViewChart View without Active Cursor Chart ViewView Orientation Combo ViewViewing Cartography Chart View with Cursor PresentWaypoints, Routes and Tracks Introduction to NavigationSave, 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 +/- KeyMenu System Powering Up the UnitSonar Tab Normal Mode Advanced Mode Start-Up Options Menu Normal OperationNormal Simulator System Status System Status SimulatorSelf Test Accessory TestGPS Diagnostic View GPS Diagnostic ViewSonar views only Sonar X-PressTMMenuTo adjust the Sensitivity SensitivityHighlight Sensitivity on the Sonar X-PressTMmenu Upper Range To adjust the Upper RangeTo adjust the Lower Range Lower RangeHighlight Lower Range on the Sonar X-PressTMmenu 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 views only Navigation X-PressTMMenuWaypoint Submenu contains the following menu choices Waypoint NameTo view the Waypoint Name Submenu Highlight WaypointName on the Navigation X-PressTMmenuTo move cursor to a saved waypoint Chart or Combo view onlyCursor to Waypoint Save Current TrackClear Current Track Save Current RouteSkip Next Waypoint Only 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 GridMost recently-created waypoint Press the Menu key twice to access the Main Menu Sonar Menu TabSonar tab To turn Fish ID+ on or off Fish ID+TMHighlight Fish ID Sensitivity on the Sonar main menu To change the Fish ID Sensitivity settingTo change the RTS Window setting Fish ID SensitivityDepth Lines To change the Zoom Width SettingTo change the Depth Lines setting Zoom WidthSurface Clutter To change the Surface Clutter settingMax Depth To change the Noise Filter settingTo change the Max Depth setting Noise FilterWater Type To change the Water Type settingNavigation tab Navigation Menu TabHighlight 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 SubmenuWaypoints Submenu contains the following menu choices WaypointsTo view the Waypoints Submenu Highlight Waypoints on the Navigation main menuRoutes Submenu contains the following menu choices RoutesTo view the Routes Submenu Highlight Routes on the Navigation main menuChart Orientation North ReferenceGrid Rotation Track Min Distance To change the Trackpoint Interval settingTo change the Track Minimum Distance setting Trackpoint IntervalMap Datum Course Projection LineDelete All Nav Data Chart Menu Tab Chart Detail Level To change the Chart Detail Level settingHighlight Chart Detail Level on the Chart main menu Lat/Lon Grid To change the Map Borders settingTo change the Lat/Lon Grid setting Map BordersTo set the Simulation Position Set Simulation PositionTo Clear Map Offset To change the Map Offset settingSet Map Offset Clear Map OffsetAlarms Menu Tab To 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 Units Depth Units TempUnits Distance User Mode Units SpeedLanguage To Restore Defaults Triplog ResetRestore Defaults To Reset TriplogAdvanced, Sonar view only Select ReadoutsTo change the Depth Offset setting Depth OffsetTo Select Readouts Speed Calibration To change the Temp Offset settingTo change the Speed Calibration setting Temp OffsetTo change the Local Time Zone To change the Daylight Saving Time settingLocal Time Zone Daylight Saving TimeTo change the Time Format To change the Position Format settingPosition Format Time FormatDate Format Nmea OutputTo change the Date Format Sonar To turn Nmea Output on or offTo turn Sonar on or off Highlight the View main menu tab Views Menu TabCombo View To Change the View Status of Any ViewSeriesTM Defaults to Simulator with a Transducer Attached TroubleshootingDisplay Problems Problem Possible CauseOr faulty Cavitation from Finding the Cause of NoiseIsolation Boat’s engineSpecifications Sonar Terms GlossaryPage Page Page Page Receiver See Transmitter Page Page Page GPS & Navigation Terms Page Page 100 101 102 103 104 105 Contact Humminbird
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