Lighthouse a65 - Distances, Range, and Bearing

20.6Distances,range,andbearing
Whenyouareusingtheradarapplication,youcan
measuredistances,rangesandbearingsinavariety
ofways.
Theseoptionsaredetailedinthetablebelow:
Functions
Distances
Between
Points
Range
FromYour
VesselBearings
RangeRings
Yes(approx-
imatedis-
tance)
Yes(approx-
imaterange)
No
Cursor
NoYesYes
Variable
Range
Markers/
Electronic
BearingLines
(VRM/EBL)
NoYesYes
Floating
VRM/EBL
YesNoYes
Measuringusingtherangerings
Usetherangeringstogaugetheapproximate
distancesbetweenpoints.Rangeringsare
concentriccirclesdisplayedonthescreenand
centredfromyourvesselatpre-setdistances.The
numberandspacingoftheringschangesasyou
rangeinandout.
Examples:
D12214-1
D12215-1
D12216-1
Range—1/4nm
RangeRings—
760ftapart
Range—3/4nm
RangeRings—
1/4nmapart
Range—11/2nm
RangeRings—
1/4nmapart
Measuringusingthecursor
Tomeasurethebearingandrangefromyour
vesseltoaspeciedtarget,movethecursortothe
appropriatepositiononthescreenandpressOk,
theradarcontextmenuwillbedisplayedwhichshall
provide:
•Latitude
•Longitude
•Range
•Bearing
D12217-2
1
2
ItemDescription
1.
Cursor
2.
Bearingandrangefromyour
vesseltothecursorposition
Youcanalsodisplaythecursorpositioninthe
databar,fromthehomescreenselect:Customize
>DatabarSet-up>EditDatabar,nowselectthe
databoxwhereyouwantthecursorpositiontobe
displayed.SelectNavigation>CursorPosition.
MeasuringusingVRM/EBL
VariableRangeMarkers(VRM)
AVariableRangeMarker(VRM)isacirclecentred
onyourvessel’spositionandxedwithrespectto
theheadingmode.Whenthiscircleisadjustedto
alignwithatarget,itsrangefromyourvesselis
measuredanddisplayedontheRadarcontextmenu
whenyouselecttheVRMwiththecursor.
ElectronicBearingLines(EBL)
AnElectronicBearingLine(EBL)isalinedrawn
fromyourvesseltotheedgeofthewindow.When
thislineisrotatedtoalignwithatarget,itsbearing
relativetoyourvessel’sheadingismeasuredand
displayedontheRadarcontextmenuwhenyou
selecttheVRMwiththecursor.
TheVRM/EBLarecombinedtomeasureboththe
rangeandthebearingofthespeciedtarget.
D8403-2
1
3
2
0.624nm
56°S
4
VRM/EBL
ItemDescription
1VRM
2Target
3EBL
4Rangeandbearing
MeasuringusingoatingVRM/EBL
YoucanusetheVRM/EBLoatfunctiontomeasure
therangeandbearingbetweenanytwopointsonthe
radarscreen.Thisfunctionallowsyoutomovethe
VRM/EBLcentreawayfromyourvessel’sposition
andontoatarget.Youcanthenchangetheradius
oftheVRMtodeterminethedistancebetweentwo
pointsandchangetheangleoftheEBL,relativeto
itsneworigin,toobtainthebearing.
302aSeries/cSeries/eSeries