How Sonar Works | Humminbird 363 specs

How Sonar Works

Sonar technology is based on sound waves. The 300 SeriesTM Fishing System uses sonar to locate and define structure, bottom contour and composition, as well as depth directly below the transducer.

Your 300 SeriesTM Fishing System sends a sound wave signal and determines distance by measuring the time between the transmission of the sound wave and when the sound wave is reflected off of an object; it then uses the reflected signal to interpret location, size, and composition of an object.

Sonar is very fast. A sound wave can travel from the surface to a depth of 240 ft (70 m) and back again in less than 1/4 of a second. It is unlikely that your boat can "outrun" this sonar signal.

SONAR is an acronym for SOund and NAvigation Ranging. Sonar utilizes precision sound pulses or "pings" which are emitted into the water in a teardrop-shaped beam.

The sound pulses "echo" back from objects in the water such as the bottom, fish and other submerged objects. The returned echoes are displayed on the LCD screen. Each time a new echo is received, the old echoes are moved across the LCD, creating a scrolling effect.

When all the echoes are viewed side by side, an easy to interpret "graph" of the bottom, fish and structure appears.

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Humminbird 363 manual How Sonar Works

Contents

GPS Chartplotter Operations Manual Thank You Table of Contents Key Functions Iii Sonar Menu Tab Chart Menu Tab Specifications Glossary How Sonar Works Peak to Peak measures power output at the highest points DualBeam Plustm Sonar How GPS and Cartography WorkPage What’s On the Display Bait Ball Hard Bottom Rocky Bottom 83 kHz, Wide Beam Hollow Fish Symbol Adjacent to your boat, including the following items Zoom View Chart View ViewsSonar views Sonar View Sonar View Sonar View Understanding Sonar History Real Time Sonar RTS Window Freeze Frame Bottom PresentationPage Sonar Zoom View Sonar Zoom View 200/83 kHz Split Sonar View 200/83 kHz Split Sonar View Big Digits View Big Digits ViewCircular Flasher View Bird’s Eye View Bird’s Eye View Chart 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 Tracks Save, Edit, or Delete a Waypoint Navigate to a Waypoint or Position Navigation X-PressTMmenu Add a Waypoint Target or Trolling Grid Save, Edit or Delete a Route Save or Clear a Current Track Edit, Delete or Hide Saved Tracks POWER/LIGHT Key Key FunctionsView Key Info Key Menu Key WAY Cursor Control Key Mark Key Goto KeyZoom +/- Key Exit Key Powering Up the Unit Menu SystemTitle Screen Press TM Menu Sonar Tab Normal Mode Advanced Mode Normal Simulator System Status Start-Up Options MenuNormal Operation Simulator SimulatorSystem Status Accessory Test System Status Accessory Test ScreenSelf Test System Status Self Test Screen GPS Diagnostic View GPS Diagnostic View Sonar X-PressTMMenu Sonar X-PressTMMenuSonar views only To adjust the Sensitivity SensitivityHighlight Sensitivity on the Sonar X-PressTMmenu Sensitivity at Low Sensitivity at Medium To adjust the Upper Range Upper Range Highlight Lower Range on the Sonar X-PressTMmenu To adjust the Lower RangeLower Range Chart Speed To adjust the Chart SpeedTo adjust the Bottom View Bottom View To adjust the Bottom Range Bottom RangeBottom Lock To turn on Bottom Lock Cancel Navigation To Cancel NavigationHighlight Cancel Navigation on the Sonar X-PressTMmenu Only when Navigating Navigation X-PressTMMenu Navigation X-PressTMMenuNavigation views only Waypoint Name To view the Waypoint Name SubmenuHighlight WaypointName on the Navigation X-PressTMmenu Waypoint Submenu contains the following menu choices Clear Current Track Cursor to WaypointSave Current Track Save Current Route Skip Next WaypointTo Save Current Route To Skip Next Waypoint Highlight Cancel Navigation on the Navigation X-PressTMmenu Remove TargetTo Remove a Target Only if a Target is Active Remove Grid Sonar WindowTo Remove a Grid To Set the Size of the Sonar Window in the Combo View Most recently-created waypoint Waypoint Name Submenu Press the Menu key twice to access the Main Menu Sonar Menu TabSonar tab Sonar Menu Highlight 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 To change the Fish ID Sensitivity setting To change the RTS Window settingFish ID Sensitivity Highlight Fish ID Sensitivity on the Sonar main menu To change the Zoom Width Setting Zoom WidthKHz Sensitivity Highlight Zoom Width on the Sonar main menu Depth Lines To change the Depth Lines settingDepth Lines Surface Clutter To change the Surface Clutter settingSurface Clutter To change the Noise Filter setting To change the Max Depth settingNoise Filter Max Depth To change the Water Type setting Water Type Navigation Menu Tab Navigation Menu TabNavigation tab Current Track Current Track allows you to view the Current Track submenuTo view the Current Track Submenu Highlight Current Track on the Navigation main menu Saved Tracks Saved Tracks allows you to view the Saved Tracks submenuTo view the Saved Tracks Submenu Highlight Saved Tracks on the Navigation main menu Waypoints Waypoints allows you to view the Waypoints submenuTo view the Waypoints Submenu Highlight Waypoints on the Navigation main menu Routes To view the Routes SubmenuHighlight Routes on the Navigation main menu Routes Submenu contains the following menu choices Grid Rotation Chart OrientationNorth Reference To change the Trackpoint Interval setting To change the Track Minimum Distance settingTrackpoint Interval Track Min Distance To change the Map Datum setting Map Datum To change the Course Project Line setting Course Projection LineDelete All Nav Data To Delete All Navigation Data Chart Menu Tab Chart Menu Chart Detail Level To change the Chart Detail Level settingHighlight Chart Detail Level on the Chart main menu Map Borders To change the Map Borders setting To change the Lat/Lon Grid settingLat/Lon Grid Set Simulation Position To change the Map Offset setting Set Map OffsetClear Map Offset To Clear Map Offset Alarms Menu Tab Alarms Menu Depth Alarm Fish ID AlarmTo change the Depth Alarm setting To change the Fish ID Alarm setting Low Battery Alarm Temp AlarmTo change the Low Battery Alarm setting To change the Temp Alarm setting Off Course Alarm Arrival AlarmTo change the Off Course Alarm setting To change the Arrival Alarm setting Drift Alarm Alarm ToneTo change the Drift Alarm setting To change the Alarm Tone setting Setup Menu Tab Setup Menu Tab Units Distance Units DepthUnits Temp Language User ModeUnits Speed Triplog Reset Restore DefaultsTo Reset Triplog To Restore Defaults Default Sonar View Select ReadoutsAdvanced, Sonar view only Select Readouts To change the Depth Offset setting To change the Temp Offset settingDepth Offset Temp Offset To change the Speed Calibration setting Speed CalibrationLocal Time Zone To change the Local Time Zone To change the Daylight Saving Time setting To change the Position Format settingDaylight Saving Time Position Format Time Format Date FormatTo change the Time Format To change the Date Format Nmea Output To turn Nmea Output on or off Sonar To turn Sonar on or off Views Menu Tab To Change the View Status of Any View Troubleshooting SeriesTM Defaults to Simulator with a Transducer Attached Or faulty Display ProblemsProblem Possible Cause Finding the Cause of Noise IsolationBoat’s engine Cavitation from Specifications Glossary Sonar TermsPage Image Update Page Page Receiver See Transmitter Page Page Page GPS & Navigation Terms 101 102 103 104 105 106 107 108 Contact Humminbird 109