Furuno CSH-5L/CSH-8L Event Mark, Own Ship Position Mark, Event mark, How to use the event mark

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3. ADVANCED SONAR OPERATION

3.6Event Mark, Own Ship Position Mark

3.6.1Event mark

The event mark, which requires speed and heading data, is useful for finding the horizontal range, depth and bearing to a location some distance from current position.

Plotting an event mark on the display is equivalent to dropping a buoy with an anchoring chain that extends from surface to bottom. The buoy is fixed at its present geographical location, but the mark on the display moves to a point where present beam plane intersects the anchor chain of the buoy as the ship moves or the tilt angle is changed. This can be said of other marks as well such as fish mark and trackball mark.

 

 

(35)

 

B

Stored when

You observe picture from

EVENT key is

 

pressed.

direction of mark.

A

 

 

 

How to use the event mark

Entering an event mark

1.Operate the trackball to place the trackball mark where you want to place an event mark (latest event mark).

2.Press the [EVENT] key. The horizontal range, depth and bearing to the event mark appear at the bottom left corner of the sonar display.

Event mark position is calculated from ship’s speed and heading data and it moves on the screen with own ship’s movement. With connection of a navigator, the latitude and longitude of the event mark are output to the navigator when an event mark is entered, in NMEA format TLL sentence.

→234 : Horizontal range (m) from own ship mark to mark ↓ 121 : Depth (m) to mark

( 121) : Depth (m) of mark at moment EVENT key is pressed.

B SW/W : Bearing (degree)*

*Bearing format may be selected with EVENT/FISH on the MARKS menu.

**Any value which exceeds 9999 is displayed

with four asterisks (****).

Event mark data, shown at bottom left corner of the display

3-7

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Contents Color Scanning Sonar 00080940402 Safety Instructions Turn off the hull unit before using the hand crank Table of Contents Marks and Data Index Foreword FeaturesWord to the Owner of the CSH-5L/CSH-8L System configuration of CSH-5L System ConfigurationVii Viii System configuration of CSH-8LControl Unit Operational OverviewControl unit Remote controller Remote Controller optionTurning on the power Basic Operating ProcedureLowering the transducer Sonar menu TransmittingSystem menu Adjusting backlighting of control unitCOMBI-1 Choosing a display modeMode description Description Display NormCOMBI-1 display sonar display + audio display Normal mode display sonar displaySonar display COMBI-1 display sonar display + audio displayDetection range Choosing the display rangeCOMBI-2 display sonar display + echosounder display COMBI-2 display sonar display + echosounder displayRetracting the transducer, turning off the power Adjusting the gainExamples of proper and improper gain Automatic tilt on/off Setting the Tilt AngleTilt range Range m ±2-10 ±4-14 ±6-20 ±10-26 Range and tilt angleAuto tilt concept Case 2 Tilt angle 10 to 20 degrees How to discriminate fish echoes from the bottomBottom and tilt angle Case 1 Tilt angle 30 to 40 degreesTilt angle for surface fish Points to considerTilt angle and surface fish example CSH-5L Location of trackball data Finding Range and Bearing to a TargetSuitable tilt angle Depth, detection range and tilt angleSonar Menu Overview Operating procedureDescription of sonar menu Sonar menu descriptionDescription Ref. Description of sonar menu con’t from previous This page intentionally left blank Eliminating Unwanted Echoes Fine Tuning the Sonar PictureHow TVG works Suppressing Bottom Tail Displaying Surface Fish Clearly1 AGC 3 2ND AGC Pulse lengthHow to adjust TX output Rejecting noise with the noise limiter Rejecting Sonar Interference and NoiseIdentifying noise source Rejecting noise with the interference rejectorInterference rings Rejecting interference with TX cycleHorizontal beamwidth Choosing BeamwidthDeleting Weak Echoes Echo AveragingThis page intentionally left blank Tracking a Fish School target lock Advanced Sonar OperationTarget lock mark and target lock data Target lock and tilt angle Detecting Fish Schools Aurally Fish alarm zone Fish AlarmFish alarm zones Entering a fish mark Measuring Fish School SpeedFish mark and fish mark data Relocating Fish School for Easy Observation How to use the off-center functionDeleting individual fish marks Entering an event mark How to use the event markEvent Mark, Own Ship Position Mark Event markDeleting an event mark Entering an own ship position markEvent marks Track Collectively Deleting MarksShip Erase Marks dialog box Function Keys F1-F4Operating the function keys Programming for fishing ground or target fishBeamwidth Color Curve Response Programming specific functionUseful programs main items only TX Output Pulse Length TX Cycle TVG Near TVG FAR HORFunction key assignment confirmation screen Confirming function key programHow the stabilizer works Suppressing Effects of Pitching and Rolling StabilizerStabilizer mark Advanced Sonar Operation Choosing the Range Echosounder ModeDisplay range and shift concept Sounder menu Adjusting the GainMeasuring Depth Picture Advance SpeedMeasuring depth Clutter Suppressing InterferenceSuppressing Low Level Noise InterferenceWeak echoes Erasing Weak EchoesDraft Other Items on the Sounder MenuSounder menu description CurveMarks and Data on the Normal Display Marks and DataMarks and data on the normal display Points to North Heading Mark Description of marks and data on the normal displayMarks and Data Press the R/B key. Own ship position and trackball mark are Marks and data on the echosounder and audio displays Marks and Data on the Echosounder and Audio DisplaysOn the System menu Bottom Echo Interpreting the DisplayBottom echoes Fish echoes Fish SchoolWake Sea Surface ReflectionsWake Sea surface reflectionsNoise and interference False Echo by SidelobeNoise and Interference Sidelobe echoMarks Menu Marks and System MenusMarks menu Marks menu description Disp Select System MenuSystem menu Description of System menu DimmerDescription of System menu con’t from previous General Maintenance MAINTENANCE, TroubleshootingCleaning the Equipment Hull unit maintenance points Hull Unit MaintenanceLubrication points, zinc plate Hull unit Manually raising the transducerHand crank Type Code No Fuse ReplacementFan Replacement Unit Fuse Type Code NoSymptom Check, Remedy TroubleshootingHigh speed Error MessagesMessage Meaning, Remedy Overvoltage Transducer not retractedChoosing a diagnostic test Diagnostic TestsSingle test, Continuous test Description of diagnostic testsContinuous test example CSH-5L, 55 kHz transducer Panel test Panel testPattern test Color testWhite RED Green Blue Color testSIO test SIO testEcho tests Echo testsSpecifications of Color Scanning Sonar CSH-5L/8L Hull Unit Interface This page is intentionally left blank AP-1 Menu TreeSonar menu Sounder menuSystem menu Marks menuAP-2 IN-1 Index

CSH-5L/CSH-8L specifications

Furuno CSH-5L and CSH-8L are advanced marine radar systems known for their cutting-edge technology and user-friendly interfaces. Designed primarily for maritime applications, these radar units cater to a wide range of vessels, from commercial ships to fishing boats. The primary distinguishing feature of the CSH-5L and CSH-8L radar systems lies in their ability to provide high-resolution images and precise detection of targets, ensuring navigational safety and operational efficiency on the water.

One of the standout technologies incorporated into both models is the pulse compression technique. This feature significantly enhances target resolution and minimizes blind spots, allowing the radar to detect smaller objects at greater distances. With the CSH-5L and CSH-8L's powerful signal processing capabilities, users can expect exceptional performance even in challenging weather conditions, ensuring reliable operation during storms or fog.

The CSH-5L model operates at a frequency range of 5 GHz, while the CSH-8L uses an 8 GHz frequency. Both radars are equipped with a rotating antenna that provides a wide coverage range, allowing for efficient monitoring of the surrounding marine environment. Their high sensitivity and low noise levels enhance target detection, making them particularly useful for locating small fishing vessels or buoys.

Another important characteristic of the Furuno CSH-5L and CSH-8L is their user-friendly interfaces. Both models feature intuitive controls, allowing operators to adjust settings easily and access critical information quickly. The displays are designed for clarity, enabling users to distinguish between targets and navigate effectively.

Additionally, the radar systems include advanced features such as automatic target tracking and target acquisition capabilities. This functionality allows users to monitor multiple targets simultaneously, providing essential situational awareness for safe navigation. The CSH-5L and CSH-8L also support integration with other onboard systems, including ECDIS (Electronic Chart Display and Information System), which enhances the overall effectiveness of maritime navigation.

In summary, the Furuno CSH-5L and CSH-8L radar systems represent the forefront of marine radar technology, offering exceptional detection capabilities, user-friendly controls, and robust integration options. Their advanced features ensure that mariners can navigate confidently, making them a vital asset for anyone operating in the marine environment.
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