Humminbird 161 manual

Page 98

Inverse grayscale works well in very clear water. Debris-laden water often appears as a lot of clutter on the screen.

Instant Image Update: Instant Image Update is a Humminbird® feature that updates all the sonar information on the display when Sensitivity and a variety of sonar settings (Bottom View, Range, etc.) are modified. This differs from the traditional functionality that only updates the new sonar information collected after the setting change. Instant Image Update permits more accurate fine-tuning of the display because the user can see the results on the complete sonar graph. When combined with the Freeze Frame feature, the user can adjust and understand the effects of many different sonar settings quickly and easily.

Maximum Depth Menu: The Maximum Depth Menu is a Humminbird® feature that optimizes performance based on the maximum operational depth set by the user. Many Humminbird® units can operate across a very broad depth range (up to 2500 feet) which causes the unit to "look" up to that full depth under some circumstances. Due to the speed of sound in water, this can result in less responsiveness because the unit has to wait for a longer period of time to receive the sonar signal. When the Maximum Depth menu is set to a lower value, the unit only looks up to the setting, which increases the responsiveness of the unit. This is an important feature for anyone operating in shallower depths!

Noise: Noise is unintentional, external sound waves that interfere with the optimal operation of sonar. Noise appears as random "dots" on the display, and is caused by a variety of sources. Electrical noise (from trolling motors, bilge pumps, VHF radios) typically manifests as a consistent dot pattern. Electrical noise can be isolated by selectively turning on and off other electrical devices to determine the source. Often re- routing the power cable, or connecting to an alternative power supply (second battery) can help overcome electrical noise. Hydrodynamic noise (from propeller and/or hull cavitation) has a more random appearance and is generally related to boat speed, so that faster operation results in more noise. Hydrodynamic noise can be overcome by proper transducer installation. Many Humminbird® products have a Noise Filter menu setting that allows the user to clear the screen of noise that is difficult to eliminate.

Pixels: Pixels are the "picture elements", or small square blocks, that make up the image on the LCD. Measured as a vertical by horizontal number (i.e. 640 V x 320 H), this key specification typically indicates the quality of resolution. In fishfinders, the total resolution (vertical multiplied by horizontal) is often less important than the "Vertical Pixel" resolution. See Pixels, Vertical.

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Contents GPS Chartplotter Operations Manual Thank You Table of Contents Key Functions IiiSonar Menu Tab Chart Menu Tab Specifications Glossary Contact Humminbird 103 How Sonar Works Peak to Peak measures power output at the highest points Single Beam Sonar How GPS and Cartography WorkPage What’s On the Display Bait Ball Hard Bottom Rocky BottomStructure where fish may be hiding Adjacent to your boat, including the following itemsSonar views Zoom View Chart View Big Digits ViewViews Sonar ViewSonar View Understanding Sonar History Real Time Sonar RTS WindowFreeze Frame Bottom PresentationPage Sonar Zoom View Sonar Zoom ViewBig Digits View Circular Flasher ViewBird’s Eye View Bird’s Eye ViewChart View Chart View without Active CursorCombo View View OrientationChart View with Cursor Present Viewing CartographyIntroduction to Navigation Waypoints, Routes and TracksSave, Edit, or Delete a Waypoint Navigate to a Waypoint or Position Navigation X-PressTMmenu Add a Waypoint Target or Trolling GridSave, Edit or Delete a Route Save or Clear a Current Track Edit, Delete or Hide Saved TracksView Key POWER/LIGHT KeyKey Functions Info KeyMenu Key WAY Cursor Control KeyZoom +/- Key Mark KeyGoto Key Exit KeyPowering Up the Unit Menu SystemSonar Tab Normal Mode Advanced Mode Normal Simulator System Status Start-Up Options MenuNormal Operation Simulator System StatusAccessory Test Self TestGPS Diagnostic View GPS Diagnostic ViewSonar X-PressTMMenu Sonar views onlyHighlight Sensitivity on the Sonar X-PressTMmenu To adjust the SensitivitySensitivity To adjust the Upper Range Upper RangeHighlight Lower Range on the Sonar X-PressTMmenu To adjust the Lower RangeLower Range To adjust the Bottom View Chart SpeedTo adjust the Chart Speed Bottom ViewBottom Lock To adjust the Bottom RangeBottom Range To turn on Bottom LockHighlight Cancel Navigation on the Sonar X-PressTMmenu Cancel NavigationTo Cancel Navigation Only when NavigatingNavigation X-PressTMMenu Navigation views onlyHighlight WaypointName on the Navigation X-PressTMmenu Waypoint NameTo view the Waypoint Name Submenu Waypoint Submenu contains the following menu choicesSave Current Track Chart or Combo view onlyCursor to Waypoint To move cursor to a saved waypointSkip Next Waypoint Clear Current TrackSave Current Route To Remove a Target Highlight Cancel Navigation on the Navigation X-PressTMmenuRemove Target Only if a Target is ActiveTo Remove a Grid Remove GridSonar Window To Set the Size of the Sonar Window in the Combo ViewMost recently-created waypoint Sonar tab Press the Menu key twice to access the Main MenuSonar Menu Tab Fish ID+TM To turn Fish ID+ on or offFish ID Sensitivity To change the Fish ID Sensitivity settingTo change the RTS Window setting Highlight Fish ID Sensitivity on the Sonar main menuZoom Width To change the Zoom Width SettingTo change the Depth Lines setting Depth LinesTo change the Surface Clutter setting Surface ClutterNoise Filter To change the Noise Filter settingTo change the Max Depth setting Max DepthTo change the Water Type setting Water TypeNavigation Menu Tab Navigation tabTo view the Current Track Submenu Current TrackCurrent Track allows you to view the Current Track submenu Highlight Current Track on the Navigation main menuTo view the Saved Tracks Submenu Saved TracksSaved Tracks allows you to view the Saved Tracks submenu Highlight Saved Tracks on the Navigation main menuHighlight Waypoints on the Navigation main menu WaypointsTo view the Waypoints Submenu Waypoints Submenu contains the following menu choicesHighlight Routes on the Navigation main menu RoutesTo view the Routes Submenu Routes Submenu contains the following menu choicesGrid Rotation Chart OrientationNorth Reference Trackpoint Interval To change the Trackpoint Interval settingTo change the Track Minimum Distance setting Track Min DistanceDelete All Nav Data Map DatumCourse Projection Line Chart Menu Tab Highlight Chart Detail Level on the Chart main menu Chart Detail LevelTo change the Chart Detail Level setting Map Borders To change the Map Borders settingTo change the Lat/Lon Grid setting Lat/Lon GridSet Simulation Position To set the Simulation PositionClear Map Offset To change the Map Offset settingSet Map Offset To Clear Map OffsetAlarms Menu Tab To change the Depth Alarm setting Depth AlarmFish ID Alarm To change the Fish ID Alarm settingTo change the Low Battery Alarm setting Low Battery AlarmTemp Alarm To change the Temp Alarm settingTo change the Off Course Alarm setting Off Course AlarmArrival Alarm To change the Arrival Alarm settingTo change the Drift Alarm setting Drift AlarmAlarm Tone To change the Alarm Tone settingSetup Menu Tab Units Distance Units DepthUnits Temp Language User ModeUnits Speed To Reset Triplog Triplog ResetRestore Defaults To Restore DefaultsSelect Readouts Advanced, Sonar view onlyTo Select Readouts To change the Depth Offset settingDepth Offset Temp Offset To change the Temp Offset settingTo change the Speed Calibration setting Speed CalibrationDaylight Saving Time To change the Daylight Saving Time settingLocal Time Zone To change the Local Time ZoneTime Format To change the Position Format settingPosition Format To change the Time FormatTo change the Date Format Date FormatNmea Output To turn Sonar on or off SonarTo turn Nmea Output on or off To Change the View Status of Any View Views Menu TabCombo View Highlight the View main menu tabTroubleshooting SeriesTM Defaults to Simulator with a Transducer AttachedOr faulty Display ProblemsProblem Possible Cause Boat’s engine Finding the Cause of NoiseIsolation Cavitation fromSpecifications Glossary Sonar TermsPage Page Page Page Receiver See Transmitter Page Page Page GPS & Navigation Terms Page Page 100 101 102 103 104 Contact Humminbird 105
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