Measuring the Range, Measuring range by range rings

2. RADAR OPERATION

2.10Measuring the Range

You can measure the range to a radar target three ways: by the range rings, by the cursor, and by the VRM (Variable Range Marker).

2.10.1Measuring range by range rings

Count the number of rings between the center of the display and the target. Check the range ring interval and judge the distance of the echo from the inner edge of the nearest ring.

To turn the range rings on, do the following:

1.If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.

2.Press the RADAR DISPLY soft key.

.250/	.125nm	319.9	° M	RADAR
SP				DISPLAY
H-UP				DISPLAY
H-UP
				MODE
				HD UP

SHIFT

RINGS

MED

OFF

RETURN

+ 359.9° R 0.277nm

Radar display soft keys

3.Press the RINGS soft key to change the brilliance among LOW, MED, HIGH and OFF.

4.Press the RETURN soft key to finish.

2-11

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Image 45

Furuno 1943, 1933, 1833 manual Measuring the Range, Measuring range by range rings

Contents

Marine Radar 00080918601 Do not open the equipment Furuno agent or dealer about replacementDo not disassemble or modify the equipment Keep heater away from equipment Table of Contents 11.6 Iii Plotter Operation Video Sounder Operation Customizing Your Unit Vii MAINTENANCE, Troubleshooting Viii Word to the Owner of the Model 1833/1933/1943 Marine Radar Features NavNet system NavNet system Two-unit NavNet system Two-unit NavNet systemThree-or-more-unit NavNet system Xii What is WAAS? Operational Overview Display unit controls Operating ControlsOverview of display unit controls Control panel Soft keys Display unitRadar display Enter knob Enter knob Alphabet, symbol, numericNumerics Trackball Remote controller Remote controller Inserting a Chart Card Chart card and card removerDisplay unit Startup sequence Turning the Unit On/Off Brilliance adjustment soft keys Display brilliance, panel brillianceDisplay brilliance and panel brilliance windows Brilliance boost Economy mode Display modes Selecting a DisplayDisplay screens Screen type and available display screen Selecting a display Display screen selection windowRadar combination screen selection window Switching control in combination screens Selecting image source Select source menuRadar source and sounder source windows Cursor, cursor data Trackball, Cursor Entering the MOB Mark, Setting MOB as Destination MOB conceptMOB mark messages Showing, hiding data boxes with soft key Data BoxesRearranging data boxes Temporarily erasing a data box Function Keys Executing a functionFunction keys Simulation Display Simulation setup menuRadar NavNet display unit-generated echoes Plotter NavNet radar antenna-generated echoes Sounder Radar Display Radar Operation Adjusting the Gain TuningTuning window Transmitting, Stand-by Gain sensitivity window Gain adjustment soft keys SEA setting window Adjusting the A/C SEAReducing Sea Clutter How the A/C SEA works Adjusting the A/C Rain Rain setting windowReducing Precipitation Clutter Range Scale Range scales nm, smRange scales km Pulselength Signal process soft keys Presentation Mode Selecting a presentation modeRadar display soft keys Course-up presentation mode Head-up presentation modeDescription of presentation modes Head-up H-UP True motion presentation mode North-up presentation modeNorth-up N-UP True motion TR-M Measuring range by range rings Measuring the Range Measuring range by cursor How to measure range to a target with the cursor How to measure range with the VRM Measuring range by VRMEBL/VRM soft keys Erasing EBL/VRM data boxes Erasing a VRM, VRM indicationHiding EBL/VRM data boxes Moving EBL/VRM data boxes Measuring the Bearing How to measure bearing with the EBLMeasuring bearing by cursor Measuring bearing by EBL Erasing an EBL, EBL indication Erasing the Heading Line, North Marker Reducing Noise Interference Radar interference Rejecting Radar Interference Zooming in on radar targets ZoomZooming in on ARP, TTM targets Zoom Manual shift Shifting the PictureTarget no. selection window Shifting the picture manually Auto ship speed setting window Setting automatic shift maximum speedAutomatic shift Automatic shift Using the Offset EBL Predicting collision coursePredicting collision course with the offset EBL Measuring range and bearing between two targets Measuring range & bearing between two targets Trail time Echo TrailsSample echo trails Trail soft keys Starting echo trails Trail gradationMultitone and monotone trails Trail mode window Echo trail mode Types of echo stretch Echo Stretch Effect of echo averaging Echo Averaging Target soft keys Outputting TLL Data Guard Alarm Setting a guard alarm zoneHow to set a guard alarm zone Cancelling the guard alarm When the alarm is violated… Watchman Setting watchman stand-by intervalHow watchman works Turning on/off watchman Second-trace echoes Suppressing Second-trace Echoes Waypoint marker Waypoint Marker Display accuracy is affected by the following 26 ARP, TTM Operation ARP setup menu Activating/deactivating ARP, TTMARP target info window Acquiring and tracking targets ARP ARP plot symbolsManual acquisition Automatic acquisition Displaying target number ARP, TTM Automatic acquisition areaARP target number Terminating tracking of ARP targets Cancel all targets windowTerminating tracking of selected targets Terminating tracking of all targets Setting vector attributes ARP What is a vector?Vector reference, vector time Displaying past position ARP Past position displaysPlot interval window ARP target data 26.7 ARP, TTM target data CPA window 26.8 CPA/TCPA alarm ARP Canceling a lost target Lost target alarm ARPTcpa window Lost target mark Interpreting the Radar Display GeneralMinimum and maximum ranges Bearing resolution Radar resolutionRange resolution Bearing accuracy Multiple echoes False echoesMultiple echoes Sidelobe echoes Virtual image Virtual imageShadow sectors Shadow sectors Sart Search and Rescue Transponder Appearance of Sart signal on the radar display General remarks on receiving Sart General procedure for detecting Sart response Racon Radar Beacon Appearance of racon signal on the radar displaySEA control Rain control This page is intentionally left blank Plotter Displays Full-screen plotter displayFull-screen plotter display Contents of nav data window Nav data window001WPT Compass display Compass display Setting the range for the XTE monitor Reading the XTE cross-track error monitorXTE range setting window Soft keys Highway display Highway display Nav data displays Nav data display North-up Plotter display, north-up mode Auto course-up Course-upPlotter display, course-up mode, destination set Auto course-up display Chart Scale Charts scalesShifting the Display Chart card overview Chart CardsIndices and chart enlargement Chart icons and their meanings When a chart cannot be displayed Furuno and NavCharts chartsChart symbols Chart symbols Data for aids to navigation Lighthouse markExample of buoy, lighthouse data Plotter display, showing port service display Port service icons NavCharts only Cursor and data display MAP chartsObjects window Example of caution area window Icon data Lighthouse iconObject windows Sample lighthouse data Tide informationObjects window Date window Tide window Displaying track Working with TrackOwn ship track Track control menu Target track Stopping, restarting plotting of own ship track Track plotting method Track plotting method and interval for own ship trackInterval window Track plotting interval Track memory window Changing own ship track/mark distribution setting Erasing track Erasing own ship track by areaErase menu Erasing all target tracks Erasing all own ship track Entering a mark, line Marks, LinesChanging mark attributes Mark shapes Marks shape window Selecting line type Lines style window Erasing marks, linesErasing an individual mark Erasing an individual line Erasing all marks, lines Entering waypoints WaypointsEntering a waypoint at own ship position Entering a waypoint with the cursor Waypoint ark shape selection window Select Mark Entering a waypoint by range and bearing Entering a waypoint from the waypoint list Editing waypoint dataAlphanumeric and local waypoint lists Editing waypoint data from the waypoint list Plotter display Editing a waypoint from the plotter display Erasing a waypoint directly from the plotter display Erasing waypointsErasing a waypoint from the menu Erasing a waypoint from the waypoint list Chart details menu Changing waypoint mark size FURUNO, NavCharts Alphanumeric list Searching waypoints Creating routes RoutesEntering a route with existing waypoints Route menu Entering a route with the cursor Creating voyage-based routes Save route menuSave route window Displays for entry of time, distance interval For manual entry of waypoints, do the followingTo stop recording waypoints and save the route Connect route window Connecting routes Inserting a waypoint from the route list Inserting a waypoint in a routeEdit route menu Waypoint list for editing a route local list Inserting a waypoint in an intermediate location on a route Inserting a waypoint from the plotter display Erasing routes Removing waypoints from a routeRemoving a waypoint from the route list Removing a waypoint from the plotter display Navigating to a quick point NavigationSelecting quick point entry method Go to method window Navigating to multiple quick points Navigating to waypointsSelecting a waypoint from the plotter display Selecting a waypoint from the waypoint list Port services and sample port list Navigating to ports, port services NavCharts only Sample filling station locations southern Italy Selecting the route to follow Following a routePlotter display, route selected as destination Navigating waypoints in reverse order Example of when to restart navigation Restarting navigationLog display Switching waypoints Setting speed for ETA calculationAutomatic waypoint switching methods Select speed for ETA window Cancelling route navigation Audio alarm on/off AlarmsPlotter alarm menu Audio alarm window Arrival alarm How the arrival alarm worksArrival alarm window Anchor watch alarm How the anchor watch alarm worksAnchor watch alarm window Speed alarm XTE Cross-Track Error alarmHow the XTE alarm works XTE alarm window Proximity alarm Proximity alarm windowProximity mark Trip alarm window Trip alarm Plotter alarm menu, Alarm information Plotter alarm messages and their meanings Alarm messages General setup menu, Resetting Trip Distance Underwater conditions and video sounder display Principle of Operation Display mode window Sounder DisplaysSelecting a sounder display 114 Description of sounder displaysSingle-frequency display Dual-frequency display KHz picture Dual-frequency displaySounding area and transmission frequency Marker-zoom display Marker-zoom display plus normal sounder display Bottom-zoom displayBottom-zoom display plus normal sounder display Bottom-lock display plus normal sounder display Bottom-lock displayBottom discrimination display Bottom discrimination display Selecting screen split method in combination displays Scope display display onlyScope display Automatic Sounder Operation How to enable automatic sounder operationHow the automatic sounder works Types of automatic sounder modes Adjusting the gain Selecting the manual modeManual Sounder Operation Selecting display range Shifting the range Gain windowShift concept Measuring Depth, Time How to measure depth and time Reducing Interference Types of interferenceNoise limiter window Reducing Low Level Noise Appearance of clutterClutter window Signal level window Erasing Weak EchoesAppearance of weak echoes Picture Advance Speed Advancement independent of ship’s speedPicture advance window Advancement synchronized with ship’s speed How the speed-dependent picture advance mode works Sounder alarm menu Fish alarm Bottom alarmBottom alarm window Fish alarm window Fish alarm B/L window Fish alarm B/L Water temperature alarm window Water temperature alarm Depth Alarm When an alarm setting is violated Sounder alarm messages and their meanings Water Temperature Graph Zero line Interpreting the Sounder DisplayBottom echo Zero line Surface noise/Aeration Fish school echoesFish school echoes Surface noise/aeration General setup menu General Setup Con’t on next Contents of general setup menu Radar display setup Radar SetupContents of general setup menu con’t from previous Radar display setup menu Contents of radar display setup menu Radar range setup menu Radar range setup Function key setup Radar function keyRadar function key options Menu Item Function Function Key Radar function keys Plotter Setup Plotter setup menu Contents of plotter setup menuNavigation options Function Default Function Key Key Label Function key setupPlotter function key menu Plotter function key options RUL Plotter function keys Chart Setup Chart offsetPlotter display, chart offset selected FURUNO, NavCharts chart attributes Contour line menu FURUNO, NavCharts MAP chart attributesChart details menu C-MAP Cntour Line soft key Contents of chart details menu C-MAP Depth info menu C-MAP Depth Info soft key Data box menu Data Boxes Setup Hot page setup screen, Hot Page Setup HOT Navigator Setup Contents of nav setup menuNavigation data source GPS setup menu Contents of GPS setup menu GPS receiver setup Contents of GPS setup menu con’t from previous Contents of GPS sensor settings menu con’t from previous Contents of Waas Setup menu Waas Setup TD setup menu TD display setupDisplaying Loran C TDs Loran GRI & station pair window Decca chain and station pair window Displaying Decca TDs Nav Data Display Setup Nav data setup screenNav data setup window Sounder Setup System setupOn next TVG Sounder system setup menu description con’t from previous Sensor setup Sensor setup menuSensor setup menu settings Default basic ranges Sounder range setup menuSounding range, zoom range, bottom lock range Zoom range and bottom-lock ranges Sounder function key options Sounder function key menu Sounder function keys Memory Card Operations Formatting memory cardsSave data menu Saving data to a memory card Memory card messages Memory card messages Load data menu Playing back data from a memory card Uploading, Downloading Data Setting communication software on the PCUploading or downloading data Upload and download menus Waypoint data format Baud rate windowWaypoint data format Characters available for comment Route data menu Route comment data formatEnd of sentence Loading Waypoint Data from Yeoman Receive data menu Receiving Data Via Network EquipmentHost name window Marks & lines window Select sentence menu Outputting Data Through the Network Preventive Maintenance Replacement of BatteryMaintenance program Trackball Maintenance Replacement of Fuse General troubleshooting Simple TroubleshootingRadar troubleshooting Radar Plotter Plotter troubleshooting Sounder Sounder troubleshooting Memory I/O test Diagnostics Display unit test results Display unit testGPS sensor test Requires GPS Receiver GP-310B/320B GPS receiver test results Network sounder test Requires Network Sounder ETR-6/10N Network sounder test resultsARP test results Test patterns Test pattern Screen for testing keyboard, remote controller Keyboard, remote controller test GPS status display GPS Status Display Clearing Memories Memory clear menuWindows for clearing memory Error messages Error Messages This page is intentionally left blank Menu key Menu Overview Appendix LAT/LON Format DD MM. MM’ DD MM. MMM’ DD MM. MMMM’ 4800 Plotter Chart Border Line ON, OFF Speed 010.0 kt 0-999.9 kt Temperature Graph ON, OFF Radar Alarms Alarm keyPlotter Alarms Sounder Alarms Geodetic Chart List World Time Chart V E Icons Model 1833/1933/1943 Specifications of Marine Radar E3502S01D Plotter Function Coating Color Index-1 Index Index Index-2 Messages Index-3 Index-4 Presentation mode Waypoints Index-5

2.10Measuring the Range

2.10.1Measuring range by range rings

319.9

Radar display soft keys