Furuno 1824C manual Using the Offset EBL, Predicting collision course

Page 44

2. RADAR OPERATION

2.17 Using the Offset EBL

The offset EBL can be used to predict a potential collision course. It can also be used to measure the range and bearing between two targets.

2.17.1 Predicting collision course

The procedure below may be used to check if a radar target is on a potential collision course with your vessel.

1.Press the EBL/VRM key to show the EBL/VRM soft keys.

2.Press the EBL1 ON soft key to turn on the EBL1.

3.Press the OFFSET soft key. The origin of EBL1 moves to the cursor position, which is marked with an “X.”

4.Use the Trackball to place the cursor on the radar target which looks like it might be on a collision course with own ship.

5.Push the ENTER knob to fix the origin position.

6.After waiting for a few minutes (at least three minutes), rotate the ENTER knob so the EBL bisects the target at the new position. If the target tracks along the EBL towards the center of the display (your ship’s position), the target may be on a collision course with your vessel.

To cancel the offset EBL, press the OFFSET soft key.

3nm

319. 9°M

 

12/LP

EBL

H-UP

 

VRM

EBL1

ON

Target tracked

VRM1

ON

here

 

Initial target

OFFSET

 

position

EBL2

 

ON

VRM2

ON

EBL1

+ 359.9 ˚R

45.0˚R

-.---nm

11.70nm

VRM1

 

Predicting collision course with the offset EBL

2-15

Image 44
Contents Page Safety Instructions Table of Contents ARP IiiARP, TTM Data Transfer AP-1 SP-1IN-1 Declaration of ConformityFeatures Model Output Range Radar antenna size, type Rotation speedVii NavNet system Model 1824C/1834C/1934C/1944C/1954C/1964C ViiiNavNet system Model 1824C/1834C/1934C/1944C/1954C/1964C Single-unit NavNet system GD-1920C Single-unit NavNet system GD-1920CTwo-unit NavNet system Two-unit NavNet systemThree-or-more-unit NavNet system Max display units Three-or-more-unit NavNet systemDisplay unit controls Operating ControlsDisplay unit controls Soft keys Display unitRadar and plotter displays Operational OverviewKey Function Remote controllerKey Inserting a Chart Card Turning the Unit On/Off Brilliance adjustment soft keys Display Brilliance, Panel Brilliance, HueDisplay brilliance, panel brilliance Display brilliance and panel brilliance windowsNight Day Twilight 2 HueHue window Selecting a Display Display modesDisplay screens Screen type and available display screenRadar combination screen selection window Selecting a displayDisplay screen selection window Switching control in combination and overlay screens To adjust Sounder PlotterRadar source and sounder source windows Selecting image sourceSelect source menu Trackball, Cursor Cursor, cursor dataMOB mark messages Entering the MOB Mark, Setting MOB as DestinationMOB concept Data Boxes Showing, hiding data boxes with soft keyRearranging data boxes Temporarily erasing a data boxFunction Default Setting, Key Label Function KeysExecuting a function Function keysRadar Simulation setup menuSimulation Display Plotter SounderThis page intentionally left blank Radar display Radar DisplayTransmitting, Stand-by Tuning Adjusting the GainTuning window Gain sensitivity windowEffect of A/C SEA Reducing Sea ClutterHow the A/C SEA works Adjusting the A/C SEA Adjusting the A/C RainSEA setting window Rain setting windowRange Scale PulselengthRange scales nm, sm Range scales kmPresentation Mode Selecting a presentation modeSignal process soft keys Function Indicator on display Soft key labelDescription of presentation modes Head-upCourse-up North-upHow to measure range to a target with the cursor Measuring the RangeMeasuring range by range rings Measuring range by cursorVarious VRM operations How to measure range with the VRMMeasuring range by VRM Measuring the Bearing Measuring bearing by cursorMeasuring bearing by EBL Various EBL operationsErasing the Heading Line, North Marker Reducing Noise InterferenceRejecting Radar Interference Radar interferenceZoom Zooming radar targetsTarget no. selection window Zooming ARP, TTM targetsZoom Setting automatic shift maximum speed Shifting the PictureManual shift Automatic shiftPredicting collision course with the offset EBL Using the Offset EBLPredicting collision course Measuring range & bearing between two targets Measuring range and bearing between two targetsEcho Trails Trail timeSample echo trails Trail soft keysStarting echo trails Trail gradationTrail color Multitone and monotone trailsEcho Stretch Echo trail modeTrail mode window Echo Averaging Effect of echo averagingOutputting TLL Data Target soft keysHow to set a guard alarm zone Guard AlarmSetting a guard alarm zone When the alarm is violated… Cancelling the guard alarmWatchman How watchman worksSetting watchman stand-by interval Suppressing Second-trace EchoesWatchman time window Second-trace echoesWaypoint Marker Waypoint markerUsage precautions for ARP 26 ARP, TTM OperationARP setup menu Activating/deactivating ARP, TTMAcquiring and tracking targets ARP ARP Target Info windowAutomatic acquisition area window ARP plot symbolsAutomatic acquisition Displaying target number ARP, TTM Terminating tracking of ARP targetsTerminating tracking of selected targets Terminating tracking of all targetsVector reference, vector time Setting vector attributes ARPWhat is a vector? Displaying past position ARP 26.7 ARP, TTM target dataPast position displays History interval window26.8 CPA/TCPA alarm ARP ARP target dataLost target mark Lost target alarm ARPCanceling a lost target Interpreting the Radar Display False echoesMultiple echoes Sidelobe echoesShadow sector Appearance of Sart signal on the radar displaySart Search and Rescue Transponder Racon Radar Beacon General procedure for detecting Sart responseAppearance of racon signal on the radar display Plotter Displays Full-screen plotter displayFull-screen plotter display Nav data windowContents of nav data window Plotter OperationCompass display Nav graphic displayCompass display Reading the XTE cross-track error monitor XTE range setting windowAnemometer display Anemometer displayHighway display Highway displayNav data display Nav data displaysAuto course-up Perspective C-map onlyNorth-up Course-upChart Scale Chart CardsChart card overview Shifting the DisplayWhen a chart cannot be displayed Indices and chart enlargementSample chart Japan, showing indices Navionics charts Port service iconsPlotter display, showing port service display Data for aids to navigationCurrent or tide data Current data displayObject information Object information windowFind function Find windowMAP charts Cursor and data displayObjects window Example of caution area windowObject windows Icon dataLighthouse icon Tide window Sample lighthouse dataTide information Map, port service display Date windowWorking with Track Displaying trackOwn ship track Track control menuOwn ship’s track Stopping, restarting plotting of own ship trackChanging track color Track plotting method and interval for own ship track Own ship track color windowTrack plotting method Interval windowChanging own ship track/mark distribution setting Track plotting intervalInterval windows Track memory windowErasing track Erasing own ship track by areaErase menu Erasing own ship track by colorMarks, Lines Entering a mark, lineErase track by color window Erasing all own ship trackChanging mark attributes Selecting line typeMarks & lines menu Marks shape windowErasing marks, lines Lines style windowErasing an individual mark Erasing an individual lineWaypoints Entering waypointsErasing all marks, lines Entering a waypoint at own ship positionWaypoint mark color selection window Waypoint windowWaypoint mark shape selection window P T Entering a waypoint by range and bearingEditing waypoint data Entering a waypoint from the waypoint listAlphanumeric and local waypoint lists Editing waypoint data from the waypoint listErasing waypoints Editing a waypoint from the plotter displayPlotter display Erasing a waypoint directly from the plotter displayChart details menu Changing waypoint mark size Navionics GoldErasing a waypoint from the menu Erasing a waypoint from the waypoint listSearching waypoints Alphanumeric listRoutes Creating routesEntering a route with existing waypoints Route menuCreating voyage-based routes New route entry screenEntering a route with the cursor Displays for entry of time, distance interval Save route menuSave route window Connecting routes Connect route windowInserting waypoints Inserting a waypoint from the route listEdit route menu Waypoint list for editing a Route local listRemoving waypoints from a route Inserting a waypoint from the plotter displayRemoving a waypoint from the route list Removing a waypoint from the plotter displayNavigation Erasing routesNavigating to a quick point Selecting quick point entry methodNavigating to waypoints Navigating to a single quick pointNavigating to multiple quick points Selecting a waypoint from the plotter displayQP window Navigating to ports, port services NavChartTM onlySelecting an external waypoint Port services and sample port list Select ServiceFollowing a route Selecting the route to followPlotter display, route selected as destination Navigating waypoints in reverse orderLog display Example of when to restart navigationRestarting navigation Setting speed for ETA calculation Switching waypointsAutomatic waypoint switching methods Select speed for ETA windowOn the plotter display Canceling route navigationThrough the menu Alarms Audio alarm on/offPlotter alarm menu Audio alarm windowArrival alarm window Arrival alarmHow the arrival alarm works Anchor watch alarm window Anchor watch alarmHow the anchor watch alarm works XTE Cross-Track Error alarm Speed alarmHow the XTE alarm works XTE alarm windowProximity alarm Trip alarmProximity alarm window Trip alarm windowGrounding alarm C-MAP specification Grounding alarm windowAlarm information Plotter alarm menu,Message Meaning Alarm messagesPlotter alarm messages and their meanings Resetting Trip Distance General setup menu,This page intentionally left blank Selecting a sounder display Display mode windowSounder Displays Description of sounder displays Single-frequency displayIndications on the single frequency display Dual-frequency displayMarker-zoom display plus normal sounder display Sounding area and transmission frequencyMarker-zoom display Bottom-zoom display Bottom-zoom display plus normal sounder displayBottom-lock display Bottom-lock display plus normal sounder displayBottom discrimination display Bottom discrimination displayScope display display only Scope displayAutomatic Sounder Operation Selecting screen split method in combination displaysHow the automatic sounder works Types of automatic sounder modesHow to enable automatic sounder operation Selecting the manual modeManual Sounder Operation Selecting display rangeAdjusting the gain Shifting the rangeExamples of proper and improper gain Gain windowHow to measure depth and time Measuring Depth, TimeReducing Interference Types of interferenceReducing Low Level Noise Noise limiter windowAppearance of clutter Clutter windowAppearance of weak echoes Signal level windowErasing Weak Echoes Color bar 16 color when white marker function is active White MarkerPicture Advance Speed Advancement independent of ship’s speedAdvancement synchronized with ship’s speed Picture advance windowHue No Echo Color Background Color Display ColorsHue no. and background and echo colors Sounder alarm menu Alarm audio windowBottom alarm Fish alarmBottom alarm window Fish alarm windowFish alarm B/L Water temperature alarmFish alarm B/L window Water temperature alarm windowWhen an alarm setting is violated Sounder alarm messages and their meaningsDepth Alarm Fish AlarmSaving Sounder Picture to an SD Card Water Temperature GraphChanging Pulse Repetition Rate Interpreting the Sounder Display Zero lineBottom echo Zero lineFish school echoes Surface noise/AerationFish school echoes Surface noise/aerationThis page intentionally left blank Turning AIS Feature On/Off AIS Option menuAIS Operation AIS Display Mode windowVector mode AIS Symbols Setting Number of AIS Targets to DisplayAIS symbols Symbol DescriptionAIS target data display Activating TargetsDisplaying Target Data Setting CPA and Tcpa Lost TargetLost target Confirming a lost targetTcpa window Proximity AlarmCPA window AIS vector time window Showing, Hiding AIS Target TracksChoosing Vector Time Displaying Past Positions of AIS Targets AIS past position displaysDeleting all data other than chart data from memory cards Memory Card OperationsSave data menu Data TransferSaving data to a memory card Memory card messagesMemory card messages Message Reason RemedyPlaying back data from a memory card Load data menuSetting communication software on the PC Uploading, Downloading DataUploading or downloading data Upload and download menusBaud rate window Waypoint data formatWaypoint data format Characters available for commentEnd of sentence Route data menuRoute comment data format Mark data format Loading Waypoint Data from YeomanMark data format Receiving Data Via Network Equipment Receive data menuHost name window Marks & lines windowOutputting Data Through the Network Select sentence menuThis page intentionally left blank General Setup General setup menuContents of general setup menu Contents of general setup menu con’t from previous Radar Setup Radar display setupRadar display setup menu AIS OptionContents of radar display setup menu Con’t on nextContents of radar display setup menu con’t from previous Model Maximum Range Radar range setupRadar range setup menu Function key setup Function Key Default FunctionRadar function key menu Radar function key optionsRadar function keys Menu Item Function Function Key LabelNavigation options Plotter SetupPlotter setup menu Contents of plotter setup menu Plotter function key menu TRK EML RUL ADD ALPPlotter function keys Plotter display, chart offset selected Chart SetupChart offset Navionics Gold chart attributes MAP chart attributes Displaying the Chart Configuration menuChart configuration menu C-MAP Contour Line Soft keyObject Content Settings Description Chart Configuration menu descriptionChart Configuration menu description Chart Configuration menu description con’t from previous Object Content Setting DescriptionNormal or U.ZOOM or O.ZOOM Depth Config menu description Depth Config soft keyDepth Config menu Data Boxes Setup Setting Setting Range Default SettingData box menu Show fromData Boxes Setup Hot Page Setup Hot page setup menuNavigation data source Navigator SetupHot page setup menu, Split X 3 screen, sub screen selection Contents of nav setup menu GPS receiver setup Set equipped with GP-310B/320B GPS setup menu Contents of GPS setup menuContents of GPS setup menu con’t on previous GPS Status TD setup menu TD display setupContents of Waas Setup menu Displaying Loran C TDs Loran GRI & station pair windowLoran C GRI & station pair window Displaying Decca TDsNav Data Display Setup Nav data setup screenSounder Setup System setupNav data setup window Sounder system setup menuSounder system setup menu description TVGHF,LF SM1-SM4, OFFSounder system setup menu description con’t from previous Sensor setup Sensor setup menuSensor setup menu settings Setting range for default Default SettingSounder range setup menu Default basic rangesSounding range, zoom range, bottom lock range Zoom range and bottom-lock rangesTLL CLT SLV Sounder function key menuSounder function key options Sounder function keys Nav Graphic Display Setup NAV Graphic menuGraphic meter window Depth graph up-date windowPreventive Maintenance Maintenance programCheck point Remedy LCDReplacement of Batteries Replacement of FuseBattery on circuit board Batteries in remote controllerTrackball Maintenance Replacing the MagnetronReplacing the Synchro Belt 1824C only Radar model and magnetron usedSimple Troubleshooting General troubleshootingRadar troubleshooting GeneralPlotter troubleshooting PlotterSounder troubleshooting SounderMemory I/O Test menu DiagnosticsMemory I/O test Display unit test Display unit test resultsGPS sensor test Requires GPS Receiver GP-310B/320B GPS receiver test resultsNetwork sounder test results ARP test resultsTest pattern Test pattern sequenceKeyboard, remote controller test Screen for testing keyboard, remote controllerGPS Status Display GPS status displayWindows for clearing memory Clearing MemoriesMemory clear menu Error Messages Error messagesError Message Meaning Remedy General Heading Data MissingMenu Overview AP-1AP-2 AppendixSetup AP-3NAV Graphic Display Setup AP-4AP-5 PlotterDepth Config soft key AP-6AP-7 AP-8 Zoom Marker ON, OFF HUE 1-9Alarm key Radar AlarmsPlotter Alarms Sounder AlarmsGeodetic Chart List AP-10Icon Meaning IconsAP-11 AP-12 Specifications of Marine Radar Model 18x4C/19x4C SeriesTransceiver Module Display Unit Plotter Function Environmental Condition Specifications of Video Plotter GD-1920C Index IN-1IN-2 IndexIN-3 MessagesTD setup IN-4Page Page
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