Furuno 841 MARK-2 manual How radar works

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Targets

Own ship (radar)

Heading line

Range and bearing of a target, relative to own ship, are

D readable on the PPI.

Own ship in center

(A) Bird's eye view of situation

(B) Radar picture of (A)

Figure 1-1 How radar works

Image 14

Contents Marine Radar B . N o . O M E 3 4 4 4 Safety Instructions Do not disassemble or modify the equipment Do not open the equipmentStay away from transmitting antenna Do not operate the equipment with wet handsIii Use the correct fuseTable of Contents Features ForewordTransceiver Module contained in radome SpecificationsAntenna Unit Display UnitInterface Nmea Equipment List Installation Materials CP03-15xxAccessories FP03-05900 Complete SetOptional Equipment Configuration Model 841 MARK-2Principle of Operation How radar works Operation Control Description5NM Display Indications and MarkersTurning the Radar On and Off 675NM 220.9R 0.646NM 308.7RTransmitting Adjusting LCD Backlighting and Display ToneAdjusting Control Panel Brilliance Selecting the RangeSTC MAN Auto Adjusting GAIN, STC, A/C Rain and FTCGeneral procedure Adjusting FTC Tuning the ReceiverAdjusting A/C Rain How to tune manuallyMeasuring the Range Measuring the BearingSee the table on the next Menu OperationPress the Menu key to open the menu. The main menu appears Menu description Menu FunctionSelecting the Display Mode 11 Display modesCourse-up, you may select CU or WPT- UP, on the menu Selecting the Presentation ModeWindow Display CU course-upSilencing the audible alarm Guard AlarmSetting the guard zone WPT-UP waypoint-upCanceling the guard zone Suppressing Radar InterferenceSelecting Pulselength Suppressing Noise InterferenceOff Centering the Display Echo Trails Navigation Data DisplayPress the Menu key Select Nav Data and press the ENT key Setting up the nav data displayEcho Stretch magnifying long range echoes Turning echo stretch on or offWatchman Selecting Unit of Measurement for RangeSelecting Bearing Reference Turning on watchmanDeselecting Ranges Canceling watchmanErasing the Heading Marker Displaying Navigation Data During Stand-byOutputting Cursor Position to Navigator Visual Alarm IndicationsError Visual alarm Displaying Cursor Position, Range and Bearing to CursorTarget Properties and Radar Wave Reflection Interpreting the DisplayRadar Wave and Radar Horizon Super-refractionFalse Echoes Bearing ResolutionRange Resolution Multiple echoesSide-lobe echoes Indirect echoesNautical Chart and Radar Picture Maintenance & Troubleshooting Safety InformationPeriod Check point Remarks Preventative MaintenanceReplacing the Fuse Troubleshooting But ThenSelf Test Self TestMounting Antenna Unit InstallationSiting, handling considerations Holes for antenna unit Parallel with the fore and aft lineDisplay Unit Installation Mounting considerationsMounting procedure Display unit is designed to be mounted on a tabletopSignal cable connection ConnectionsNavigation aid, video sounder connection To connect external equipment to the OP- Tion connectorFor E/S Heading Sensor ConnectionInstallation Check List RadarFollow the procedure below to obtain proper radar picture Initial Adjustment of PictureDisplaying the Installation Menus Sweep Timing Entering Initial SettingsRelative Bearing Alignment Closing the Installation Menus Press the Menu key and turn off the powerPage Page Page Page Page Page