Humminbird 937C DF Understanding Sonar History, Real Time Sonar RTS Window, Bottom Presentation

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UNDERSTANDING SONAR HISTORY

It is important to understand the significance of the 900 Series™ display. The display does NOT show a literal 3-dimensional representation of what is under the water. Each vertical band of data received by the control head and plotted on the display represents something that was detected by a sonar return at a particular time. As both the boat and the targets (fish) may be moving, the returns are only showing a particular segment of time when objects were detected, not exactly where those objects are in relation to other objects shown on the display.

REAL TIME SONAR (RTS®) WINDOW

A Real Time Sonar (RTS®) Window appears on the right side of the display in the Sonar View only. The RTS® Window always updates at the fastest rate possible for depth conditions and shows only the returns from the bottom, structure and fish that are within the transducer beam. The RTS® Window plots the depth and intensity of a sonar return. (See Sonar Menu: RTS® Window).

BOTTOM PRESENTATION

As the boat moves, the unit charts the changes in depth on the display to create a profile of the Bottom Contour. The type of bottom can be determined from the return charted on the display. A Hard Bottom such as compacted sediment or flat rock appears as a thinner line across the display. A Soft Bottom such as mud or sand appears as a thicker line across the display. Rocky Bottoms have a broken, random appearance.

NOTE: A sloping bottom will be represented as a thicker line across the display. Harder bottoms typically will be displayed with red and softer bottoms typically will be displayed with blue.

The sonar returns from the bottom, structure and fish can be represented as either Structure ID® or WhiteLine®. See Sonar Menu: Bottom View for details on how to set the bottom view.

The Narrow RTS® Window indicates the sonar intensity through the use of colors. Red indicates a strong return and blue indicates a weak return. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.

The Wide RTS® Window indicates the sonar intensity through the use of a bar graph. The length of the plotted return provides an indication of whether the return is weak or strong. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.

Structure ID® represents weak returns in blue and strong returns in red.

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Contents Page Thank YOU Table of Contents Menu System Start-Up Options Menu Contact Humminbird HOW the 900 Series Works Series IntroductionSingle Beam Sonar Dualbeam Plus SonarMulti-Media Card MMC/SD Slot MULTI-MEDIA Card MMC/SD SlotInstallation Overview Accessory BUSAccessory Bus 900 Series has a wide variety of configurationsControl Head Installation Basic installation tasks that you must perform includeGimbal Mounting the Control Head Mounting Screws Washer Gimbal Mounting Bracket Cables Routed Near Mounting Bracket Back of Control Head IN-DASH Mounting the Control Head Temperature Plug Cable Connector Assembly to Back of Control HeadConnecting the Control Head Power Cable to the Boat Transducer InstallationTo determine transducer mounting location Transom Transducer InstallationDetermine transducer mounting location Route the transducer cableMoves clockwise as the boat moves Corner of the templateNormal Cavitation Confirm that the pivot angle has not changedAttaching the Bracket To attach the pivot to the transducer Dual frequency unitForce is necessary to pivot the assembly Order to gain access to the mounting screws,To route the transom transducer cable all transducers Inside the Hull Transducer Installation Trial installationDetermine the transducer mounting location Route the cable Permanently mount the transducerMake sure the position of the transducer is marked Inside the HullTest and Finish the Transducer Installation Trolling Motor Transducer InstallationIf you have… Then use Stem Mounting with AN Existing 1 14 Thread StemHand-tighten only Follow these steps to stem mount the GPS receiverTo the cable as shown Access Under Mounting LocationFinish Routing the Cable and Check GPS Receiver Operation No Access Under Mounting LocationSpeed Accessory Installation Install the Speed accessoryHand tighten only Cleaning the Speed accessory Routing the speed cable to the control headRotating Retaining Axial Clip to Remove Paddlewheel To test the installation Testing the System InstallationGetting Started Using Your 900 Series Powering UP the Control HeadSeries 937c DF Combo Title Screen Triplog WHAT’S on the Sonar DisplayUnderstanding Sonar History Real Time Sonar RTS WindowBottom Presentation POWER/LIGHT KEY KEY FunctionsMARK/GOTO key Info key Zoom +/- key Menu KEY View KEYWAY Cursor Control KEY Fishing requirements see View Menu TabExit KEY View Preset KeysInfo KEY MARK/GOTO KEYViews and Readouts ViewsSonar views Navigation viewsSonar View Sonar Zoom ViewSonar View Split Sonar View Sonar Zoom ViewBird’s Eye View BIRD’S EYE ViewChart View with Active Cursor Chart/Bird’s Eye Combo View1112 Chart/Sonar Combo ViewChart View with Cursor Present Chart OrientationNavigation Waypoints, Routes and Tracks To save the marked position as a waypointNavigate to a Waypoint or Position Chart View with Target Chart View with GridADD a Waypoint Target or Trolling Grid Save or Clear a Current Track Press Menu Menu SystemSonar Tab, Normal Mode START-UP Options MenuStart-Up Options Menu Normal Operation Exit Normal operation by powering your 900 Series offSimulator SimulatorSelf Test Accessory Test Accessory TestSystem Status Self TestSonar X-PRESS Menu GPS Diagnostic ViewActive Side SensitivitySplit Position To adjust the Lower Range To adjust the Upper RangeUpper Range Lower RangeZoom Level Chart SpeedBottom Lock Sonar ColorsNavigation X-Press Menu Highlight Split Position on the Navigation X-Press MenuSave Current Track Clear Current TrackSave Current Route Cancel Navigation Remove TargetRemove Grid Beam Select Sonar Menu TABTo use Beam Select Highlight Beam Select on the Sonar main menuFish ID+ To change the Fish ID Sensitivity settingFish ID Sensitivity To turn Fish ID+ on or offBottom View To adjust the Bottom ViewZoom Width To change the Zoom WidthDepth Lines KHZ SensitivitySurface Clutter Noise FilterMAX Depth Water TypeTransducer Select Temperature Graph Color BARNavigation Menu TAB Tracks RoutesWaypoints Trolling Grid Rotation North ReferenceTrackpoint Interval Track MIN DistanceMAP Datum Export ALL NAV DataDelete ALL NAV Data Chart Detail Level Chart Menu TABTo change the Chart Detail Level setting To change the Map Borders settingLAT/LON Grid Spot SoundingsShaded Depth Alarms Menu TAB SET MAP OffsetClear MAP Offset Fish ID Alarm Depth AlarmLOW Battery Alarm Temp AlarmArrival Alarm OFF Course AlarmDrift Alarm To change the Off Course Alarm settingAlarm Tone To change the Alarm Tone settingHighlight Alarm Tone on the Alarms main menu To change the Units Depth setting Setup Menu TABTo change the Units Temp setting Units DepthUnits Distance User ModeUnits Speed LanguageRestore Defaults Triplog ResetTo Reset Triplog To Restore DefaultsTo Select Readouts Default Sonar View Customized Sonar ViewTemp Offset Depth OffsetSpeed Calibration Local Time ZonePosition Format Daylight Saving TimeSonar Nmea OutputFollowing Nmea sentences are output To turn Nmea Output on or offViews Menu TAB Accessories Menu TABTo Change the View Status of Any View Highlight the View main menu tabTroubleshooting Series Doesn’t Power UpSeries Defaults to Simulator with a Transducer Attached Problem Possible Cause Display ProblemsOther electronic devices Finding the Cause of NoiseNoise re-appears Boat’s engineHumminbird Service Policy Year Limited WarrantyReturning Your Unit for Service Series AccessoriesFor IN-WARRANTY service, complete the following steps Power Output SpecificationsAppendix a Place on bottom of hullAlign with transom Appendix B Contact Humminbird
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