Raymarine a68 WiFi - Radar Application Overview and Features

16.1Radarapplicationoverviewand
features
RadioDetectionAndRanging(RADAR)equipment
isusedtodetectthepresence,distanceandspeed
ofobjects(knownas‘targets’).Radarworksby
transmittingradiopulses,thendetectingreections
ofthesepulses(echoes)fromobjectsintheareaand
displayingthereectionsastargetsonyourMFD.
Important:Untilyouarefamiliarwithinterpreting
theradardisplay;everyopportunityshouldbe
takentocomparetheradarscreenpatternswith
visualtargetssuchasothervessels,buoysand
coastalstructures.Youshouldpractiseharborand
coastalnavigationduringdaylighthoursandin
clearweatherconditions.
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Description
1Radarstatusbardisplaying:
•Range
•Radarscannerserialnumber
•Gainmode
•Orientation
•Motionmode
•Rangeringspacing
2Waypoint
3
Onscreencontrols(Touchscreen
multifunctiondisplaysonly.)
4
GuardZone
5
Ship'sHeadingMarker(SHM)(Yourvessel’s
deadaheadbearingisindicatedbythe
SHM.IfthecursorisplacedovertheSHM,
itwilltemporarilyberemovedtohelpplacing
markersoracquiringtargetsetc.)
6Radarstatus
7
Databoxoverlay
8
AIStarget
9AcquiredMARPAtarget
Description
10
Rangecontrols(Touchscreenmultifunction
displaysonly.)
11Targetbeingacquired
AdditionalfunctionalityoftheRadarapplication
includes:
•VRM/EBLmarkers
•Colorpalettes.
Ifusinganon-HDdigitalradomescanner,strongest
targetreturnsaredisplayedinyellowwithweaker
returnsin2shadesofblue.IfusingaHDColor
orSuperHDColorradarscanner,strongertarget
returnsshowasdifferentcolorsfromarangeof256
colors,providingbetterclarity.
Note:Colorsstatedaboverefertothedefault
colorpalette.
Thesizeofatargetonscreenisdependentonmany
factorsandmaynotbeproportionaltoitsphysical
size.Nearbyobjectsmayappeartobethesame
sizeasdistantlargerobjects.
Withexperience,theapproximatesizeofdifferent
objectscanbedeterminedbytherelativesizeand
color/brightnessoftheechoes.
Thesizeofeachonscreentargetisaffectedby:
•Thephysicalsizeofthereectingobject
•Thematerialfromwhichtheobjectismade
(Metallicsurfacesreectsignalsbetterthan
non-metallicsurfaces.)
•Verticalobjectssuchascliffsreectsignalsbetter
thanslopingobjectssuchassandbanks
•Highcoastlinesandmountainouscoastalregions
canbeobservedatlongerRadarranges.
Therefore,therstsightoflandmaybeamountain
severalmilesinlandfromthecoastline.Although
thecoastlinemaybemuchnearer,itmaynot
appearontheRadaruntilthevesseliscloserto
shore.
•Sometargets,suchasbuoysandsmallvessels
difculttodiscern,becausetheydonotpresenta
consistentreectingsurfaceastheybobandtoss
aboutinthewaves.Consequentlytheseechoes
tendtofadeandbrighten,andattimesdisappear
momentarily.
•Buoysandsmallvesselsresembleeachother,but
vesselscanoftenbedistinguishedbytheirmotion.
Note:AGPSreceiverandafastheadingsensor
arerequiredforMARPAoperation,andtoenable
RadaroverlayintheChartapplication.
RadarapplicationFeatures
Dependingontheconnected
radarscannerdifferent
optionswillbeavailable
•RadarFeatures
Supportsupto2radar
scannersconnected
simultaneously
•16.3Multipleradar
scanners
CollisionAvoidancefeatures•14.7CollisionAvoidance
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LightHouseMFDoperationinstructions