Humminbird 737 GPS 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 700 Series™ Fishing System 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.

Bottom Contour Profile with RTS® Window.

Temp/Speed Accessory is optional.

Hard Bottom

Soft Bottom

Rocky Bottom

The Narrow RTS® Window indicates the sonar intensity through the use of grayscale. The grayscale used matches the bottom view grayscale setting used in the sonar history window (i.e. Inverse, Structure ID®, WhiteLine®, Bottom Black). 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. The Wide RTS® Window does not make use of grayscale.

The sonar returns from the bottom, structure and fish can be represented as either Inverse (default), WhiteLine®, Structure ID®, or Bottom Black. See Sonar X-PressTMMenu: Bottom View for details on how to set the bottom view.

Freeze Frame

Freeze Frame - Pressing any arrow on the 4-WAY Cursor Control key will freeze the screen and a cursor will be displayed on the screen. The cursor can be positioned on the display using the 4-WAY Cursor Control key to determine the depth of any sonar return. The RTS® Window continues to update in Freeze Frame. In addition, see the effects of menu setting changes with Instant Image Update. Pressing EXIT will exit Freeze Frame and the display will start to scroll. Freeze Frame is available in the Sonar, Sonar Zoom, and 200/83 kHz Split Sonar Views.

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Contents Atic Table of Contents Thank YouKey Functions Views Menu Tab Accessories Menu Tab Peak to Peak measures power output at the highest points How Sonar WorksWideSide Sonar QuadraBeam SonarDualBeam Plus Sonar With optional-purchase WideSide transducerMulti-Media Card MMC/SD Slot Software UpdatesHow GPS and Cartography Work With optional-purchase GPS ReceiverWhat’s On the Display 83 kHz, Wide Beam Hollow Fish SymbolSoft Bottom RTS Real Time Sonar Window Sonar View ViewsSonar views Bottom Presentation Understanding Sonar HistoryReal Time Sonar RTS Window Freeze FrameSonar Zoom View Sonar Zoom ViewCircular Flasher View 200/83 kHz Split Sonar ViewBig Digits View Big Digits View 200/83 kHz Split Sonar ViewMaking a Screen Snapshot Screen Snapshot ViewSide Beam View Screen Capture ViewWideSide View Bird’s Eye ViewCombo View Chart View without Active CursorChart View with Active Cursor DepthViewing Cartography Waypoints, Routes and TracksSave, Edit, or Delete a Waypoint Chart View with Grid Add a Waypoint Target or Trolling GridView Key POWER/LIGHT KeyKey Functions Info KeyMark Key Accessory BusWAY Cursor Control Key Goto KeyMenu System Powering Up the UnitPresence or absence of a transducer System Status Start-Up Options MenuNormal Operation SimulatorExit PC Connect mode by powering the Fishing System off Accessory TestGPS Diagnostic View Side To adjust the SideSonar X-PressTMMenu WideSide transducer WideSide view onlySensitivity To adjust the SensitivityTo adjust the Upper Range Upper RangeLower Range Chart SpeedSide Beam Range Bottom Range Cancel NavigationBottom View Bottom LockOnly with an active cursor on a waypoint Navigation X-PressTM MenuWaypoint Name To view the Waypoint Name SubmenuClear Current Track Cursor to WaypointSave Current Track Save Current RouteRemove Grid Remove TargetSonar Window Delete All Images Screen Snapshot X-Press TM MenuDelete Image Sonar Menu TabTo use Beam Select Beam SelectFish ID+TM Highlight Beam Select on the Sonar main menuKHz Sensitivity Fish ID SensitivityZoom Width AdvancedDepth Lines KHz BalanceWideSide Sensitivity Advanced with WideSide transducerNoise Filter Surface ClutterMax Depth Transducer Select To change the Water Type settingWater Type Navigation Menu TabSaved Tracks Current TrackWaypoints North Reference Chart OrientationRoutes Grid RotationCourse Projection Line Track Min DistanceMap Datum Export All Nav DataMap Borders Chart Menu TabChart Detail Level With optional-purchase GPS Receiver onlySet Simulation Position Lat/Lon GridSpot Soundings Set Map OffsetFish ID Alarm Alarms Menu TabDepth Alarm To change the Depth Alarm settingOff Course Alarm Low Battery AlarmTemp Alarm Arrival AlarmSetup Menu Tab Drift AlarmAlarm Tone To change the Drift Alarm settingUnits Temp User ModeUnits Depth Units DistanceSelect Readouts Triplog ResetRestore Defaults Advanced, Sonar view onlySpeed Calibration Depth OffsetTemp Offset Position FormatNmea Output Time FormatDate Format SonarViews Menu Tab Accessories Menu TabUsing Screen Snapshot To Change the View Status of Any ViewTo make a screen snapshot Screen Snapshot must be enabled TroubleshootingTo view screen snapshots Display Problems Finding the Cause of NoiseSeries Fishing System Accessories SpecificationsGlossary Sonar Terms100 Receiver See Transmitter 102104 GPS & Navigation Terms 108 Contact Humminbird
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