Humminbird 767 manual Understanding Sonar History, Real Time Sonar RTS Window, Freeze Frame

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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) .

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.

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.

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, StructureID®, 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 in-

dicates 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.

Hard Bottom

 

 

Rocky Bottom

 

Soft Bottom

 

 

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-Press™ Menu: Bottom View for details on how to set the bottom view.

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Contents GPS Chartplotter Operations Manual Thank You Table of ContentsKey Functions Views Menu Tab Accessories Menu Tab How Sonar Works Peak to Peak measures power output at the highest pointsWith optional-purchase QuadraBeamTM transducer DualBeam Plus SonarQuadraBeam Sonar WideSide SonarMulti-Media Card MMC/SD Slot Software UpdatesHow GPS and Cartography Work Bait Ball Hard Bottom Rocky Bottom 200 KHzWith F f e r e n tAverage speed reading Distance distanceTraveled with Average SpeedSonar views Zoom View Chart View 200/83 kHz Split Sonar ViewViews Sonar ViewBottom Presentation Understanding Sonar HistoryReal Time Sonar RTS Window Freeze FrameSonar Zoom View Sonar Zoom ViewBig Digits View 200/83 kHz Split Sonar ViewCircular Flasher View Screen Snapshot ViewSide Beam View Side Beam ViewBird’s Eye View Bird’s Eye ViewWideSide View View Orientation Chart ViewCombo View Waypoints, Routes and Tracks Viewing CartographyNavigate to a Waypoint or Position Save, Edit, or Delete a WaypointPress menu Save, Edit or Delete a RouteSave or Clear a Current Track Add a Waypoint Target or Trolling GridView Key POWER/LIGHT KeyEdit, Delete or Hide Saved Tracks Key FunctionsGoto Key Accessory BusWAY Cursor Control Key Mark KeyTitle Screen Powering Up the UnitMenu System Simulator Start-Up Options MenuNormal Operation Self Test GPS Diagnostic ViewAccessory Test System StatusSonar views only To adjust the SideSonar X-PressTMMenu SideUpper Range To adjust the SensitivityTo adjust the Upper Range SensitivitySide Beam Range Chart SpeedLower Range Bottom Lock Cancel NavigationBottom View Bottom RangeOnly with an active cursor on a waypoint Navigation X-PressTMMenuWaypoint Name Navigation views onlySave Current Route Cursor to WaypointSave Current Track Clear Current TrackSonar Window Remove TargetRemove Grid Delete All Images Screen Snapshot X-PressTMMenuSonar Menu Tab Delete ImageTo turn Fish ID+ on or off Beam SelectFish ID+TM To use Beam SelectKHz Balance Fish ID SensitivityZoom Width KHz SensitivityDepth Lines To change the 455 kHz Balance settingTo change the Depth Lines setting WideSide SensitivityMax Depth Surface ClutterNoise Filter Navigation Menu Tab To change the Water Type settingWater Type Transducer SelectWaypoints Current TrackSaved Tracks Grid Rotation Chart OrientationRoutes North ReferenceExport All Nav Data Track Min DistanceMap Datum Course Projection LineTo change the Map Borders setting Chart Menu TabChart Detail Level To change the Chart Detail Level settingSet Map Offset Lat/Lon GridSpot Soundings Set Simulation PositionTo change the Depth Alarm setting Alarms Menu TabDepth Alarm Fish ID AlarmArrival Alarm Low Battery AlarmTemp Alarm Off Course AlarmAlarm Tone Drift AlarmSetup Menu Tab Units Distance User ModeUnits Depth Units TempAdvanced, Sonar view only Triplog ResetRestore Defaults Select ReadoutsAdvanced, with Temp/Speed only Depth OffsetTemp Offset Speed CalibrationNmea Output Position FormatTime Format Date FormatTo Change the View Status of Any View Accessories Menu TabUsing Screen Snapshot Views Menu TabTo view screen snapshots TroubleshootingTo make a screen snapshot Screen Snapshot must be enabled Finding the Cause of Noise Display ProblemsSpecifications Series Fishing System AccessoriesSonar Terms Glossary100 Receiver See Transmitter 104 GPS & Navigation Terms Magnetic North Contact Humminbird
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