Humminbird 161 manual

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GPS: GPS is an acronym for Global Positioning System. GPS provides accurate position (latitude, longitude, altitude) information virtually anywhere on the earth through satellite technology and personal receivers on the ground. A series of geosynchronous satellites broadcast a unique signal toward the earth once per second. A GPS receiver, such as that included with many Humminbird® products, receives the signals from these satellites and is able to determine position based on very slight differences in the time each signal is received and the receiver’s knowledge of the location of each of the satellites.

Heading: Heading describes the direction the boat is pointing and is measured in degrees (i.e. 321°, where 000° is North, 090° East, 180° is South, 270° is West). Due to wind and waves, the boat is often traveling in a slightly different direction than it is heading, and therefore Heading is often confused with Course Over Ground. See Course Over Ground.

Map Datum: A Map Datum refers to a particular survey of the earth’s surface that was referenced when creating a chart (i.e. WGS84). Since the earth is not flat, and not even consistently round, a mathematical model must be used to translate coordinates from the sphere of the earth to the flat surface of a chart. This mathematical model is the Map Datum. Historically, many different Map Datums have been used around the world to create maps; often a reference to the Map Datum can be found in the legend of a paper map. It is important to select the correct Map Datum setting in your fishfinder when comparing GPS position to a paper chart to avoid slight position inaccuracies. Almost all electronic charts use the WGS84 Map Datum and therefore, they do not require setting changes.

MMC: MMC is an acronym for Multi Media Card. An MMC is a postage stamp-sized memory device used to store electronic data such a maps, waypoints, routes and other information. MMC is a very rugged format suitable for the marine environment, but it is not waterproof. The MMC is removable from Humminbird® products, and can be used in a PC that is equipped with an appropriate card reader. MMC is the same format that many digital cameras use. See SD.

North, Magnetic: North is the principle reference point of the compass (i.e. North is 000°). Magnetic North relies on the earth’s magnetic field to align a metal pointer generally towards True North. However, due to local variations in the earth’s magnetic field around the globe, the difference between True North and Magnetic North can be greater than 10°. See True North.

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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 Operation Start-Up Options MenuNormal Simulator System Status Simulator System StatusAccessory Test Self TestGPS Diagnostic View GPS Diagnostic ViewSonar X-PressTMMenu Sonar views onlySensitivity To adjust the SensitivityHighlight Sensitivity on the Sonar X-PressTMmenu To adjust the Upper Range Upper RangeLower Range To adjust the Lower RangeHighlight Lower Range on the Sonar X-PressTMmenu 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 waypointSave Current Route Clear Current TrackSkip Next Waypoint 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 Menu Tab Press the Menu key twice to access the Main MenuSonar 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 choicesNorth Reference Chart OrientationGrid Rotation Trackpoint Interval To change the Trackpoint Interval settingTo change the Track Minimum Distance setting Track Min DistanceCourse Projection Line Map DatumDelete All Nav Data Chart Menu Tab To change the Chart Detail Level setting Chart Detail LevelHighlight Chart Detail Level on the Chart main menu 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 Temp Units DepthUnits Distance Units Speed User ModeLanguage To Reset Triplog Triplog ResetRestore Defaults To Restore DefaultsSelect Readouts Advanced, Sonar view onlyDepth Offset To change the Depth Offset settingTo Select Readouts 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 FormatNmea Output Date FormatTo change the Date Format To turn Nmea Output on or off SonarTo turn Sonar 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 AttachedProblem Possible Cause Display ProblemsOr faulty 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