Furuno CSH-83, CSH-84 manual Fish Alarm, How to set the fish alarm zone

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The Fish Alarm

The fish alarm sounds an audible alarm when a fish echo above a preset strength enters an alarm zone. You set parameters for the fish alarm at ALM on the data setting window.

ON/OFF: Turn alarm on or off.

Level:	Set echo strength level which will activate the alarm.
Zone:	Set alarm zone.

1.Open the data setting window and select ALM•AUDIO.

2.Press the + key of the ZONE item.

3.Operate the trackball to place the trackball mark on the start- ing point of the alarm zone.

4.Press the + key.

5.Rotate trackball clockwise to select the end point. The dis- play paints a fan-shaped alarm zone.

6.Press the + key.

Starting

point

Alarm zone

End point

Figure 7-6 How to set the fish alarm zone

Note: There must be at least three degrees difference between the starting and end points to get a fan-shaped alarm zone as shown in (a) and (b). Otherwise, the unit paints a 360 degree alarm zone as in (c) and (d).

More than 3°

(a)(b)

Within 3°

(c)(d)

7-8

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Contents Color Scanning Sonar 00080806600 Safety Instructions Do not use the equipment for other than its intended purpose Table of Contents PORT/STARBOARD, Horizontal Slice Displays Self Tests This page is intentionally left blank Foreword FeaturesWord to CSH-83/84 Owners System Configuration Standard OptionControl Layout on Display Unit and Remote Control Box Control DescriptionMain Panel Main panel control descriptionControl Function Sub Panel ENDSub Panel 2 data setting window Signal AGCProcess 2AGCAlarm SonarUP/TM SonrbeamRemote Control Box + +Turning the Power On/Off Adjusting Screen Brilliance, Control Panel BacklightingOperational Overview Lowering the TransducerSelecting a Display Mode Display mode descriptionSelecting a Display Range Setting the Tilt AngleSeabed echo and tilt angle How to discriminate fish echoes from the seabed Points to considerTilt angle for surface fish Tilt angle and sea surface reflectionsSuitable tilt angle Tilt angle and beam coverageAdjusting the Gain Measuring Range and Bearing to a TargetPage How to adjust TVG Fine Tuning the PictureEliminating Unwanted Feeble Echoes Page AGC data setting window SIGNAL, Signal Pulselength data setting window TVGTX,PL2AGC data setting window SIGNAL, Signal Process Suppressing Seabed TailRejecting Sonar Interference and Noise Data setting window TVGTX, OutputIdentifying noise source Changing Tx cycle data setting window Tvgtx CycleAdjusting Beamwidth Setting Noise limiter data setting window SignalNormal display mode Marks, Data and Display ModeMarks and Data Normal display mode w/text Echo sounder combination displayPermanently Displayed Marks and Data History displayErasable Marks and Data Mark/Data DescriptionBearing marker Mark Description Range R Auto Tilt Auto Scan Gain Brill TVG TVG DIM Page Menu Overview User Menu OperationMenu screen location and display mode User Menu Hist DSP/GRPHUser Menu Description Current VEC Save PictureSystem Menu Description FAR TVGTM DSP Target LockBRG Readout Mark SizeMenu Description Data SET Menu Description Color CurveChange Color NET Shoot PlanNET Sonde NET Plot CorrInit SET/TEST Menu Description Defaults Echo TestNET REC Others Event KEYFunction Keys Programming the Function KeysFunction Key Fine Tuning Replaying a Function KeySaving Function Key Settings to a Memory Card Replaying Function Key Settings from a Memory CardThis page is intentionally left blank Advanced Level Operation How to find fish school centerFinding Fish School Center Tracking a Fish School target lock Tracking a fish schoolTarget lock mark appearance Choosing target lock modeErasing target lock mark Tracking target lock mark Target lock and tilt angleSetting target lock conditions System Menu Target LockDescription of target lock items Detecting Fish Schools Aurally Fish Alarm How to set the fish alarm zoneHow to relocate fish schools Relocating Fish School for Easy ObservationComparing of Fish School Concentration Estimate marks and their dataHow to measure fish speed Measuring Fish School SpeedEvent Mark 10 Event marksEntering an event mark Erasing an event markTrue Motion Display 12 True motion displayPlotting Net Location Mark 13 Net location markObserving Net Behavior 14 Net behaviorTarget Slice Display No. Display Information ApplicationsThis page is intentionally left blank PORT/STARBOARD, Horizontal Slice Displays Port/Starboard displayHorizontal slice display Horizontal slice displayMemory Card Operations Initializing Memory CardsSaving the Picture Transferring Echo Data from Internal Memory to Memory CardNet shooting data contents Saving Net Shooting DataHow net shooting data is saved Transferring net shooting data to memory cardDeleting Memory Card Contents Replaying Saved DataTurning MARKS, Data ON/OFF Turning marks on/off through the data setting windowTurning marks on/off through the user menu 10-2 Interpreting the Display Seabed EchoesFish Schools Sea surface fishSea Surface Reflections WakeFalse Echo by Sidelobe Noise and InterferenceOvervoltage Warning Unretracted Transducer WarningHow to manually raise the transducer Self Tests Opening the Self Test MenuSingle test Self Test DescriptionContinuous test Panel test Color testGray test SIO testInterface Unit CS-120A Self Test Interface unit CS-120A, cover opened13-6 Input Data Selection Selection of Data at Interface Unit CS-120ASetting Distances Between Net Sonde Transmitters How to set net sonde transmitter distancesMaintenance Display Unit MaintenanceHull Unit Maintenance Zinc block near the transducer must be replaced yearlyMenu Tree User MenuData SET Menu Init SET/TEST Menu System Menu Previous Page Specifications SP-1Display SP-2Hull Unit SP-3SP-4 Index 11-2IN-2