Raymarine c95 - Page 125

Warning:CollisionAvoidanceand
theIRPCS
TheCollisionAvoidancefeatureisa
graphicalaidprovidedtohelpincrease
userawarenessofthepotentialfor
collision.Itisimportanttohavea
goodunderstandingoftheInternational
RegulationsforPreventingCollisionsat
Sea(IRPCS),sothatallactionstakenare
inaccordancewiththeIRPCS.
IntheeventofconicttheIRPCS
regulationsmusttakeprecedence.
Targetinterceptionpre-requisites
Targetinterceptiongraphicsaredisplayedinthe
Chartapplicationwhen:
•theAISoverlayisenabled
•yourownvessel’sSOGisgreaterthan2.0Kts.
•targetvessel’sSOGisgreaterthan2.0Kts.
(Under2.0Ktsthetarget’sinterceptionzoneis
displayedasacirclearoundthetarget.)
•TargetInterceptionsareturnedOnandthetarget’s
CourseOverGround(COG)willcrossyourown
COGwithinthespeciedInterceptdistance,or
•Anindividualintercepthasbeeninitiatedusingthe
contextmenu.Targetinterceptiongraphicswillbe
displayedregardlessofwhetheryourpathswill
cross.
Targetinterceptiongraphics
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1.Interceptdistance—WhenTargetinterceptions
isturnedon,targetinterceptiongraphicsare
displayedfortargetswhoseCOGcouldcross
yourownwithintheInterceptdistancespecied
ontheTargetinterceptionspage.
2.Interceptionzone—TheInterceptionzone
providesasuggestedclearanceareaaround
thetarget’sprojectedlocation.Thisenablesyou
toplotyourcoursesafelyaroundanypotential
collisionareas.
3.Interceptpoint—TheInterceptpointisonly
displayedwhenanindividualtargetinterception
hasbeeninitiatedfromthecontextmenu.
Note:Whentryingtorendez-vouswithatarget
thisisthepointtoaimfor.
4.Target’sCOGline—Target’sCOG.
5.Target—Thisisthelastreportedpositionof
thetarget.
6.Ownvessel’sCOGline
7.Ownvessel
Examplescenario1—Ownvesselmoving
fasterthanthetargetvessel
Note:Thesescenariosareexamplesprovidedfor
guidanceonly.
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IntheexampleabovethevesselsCOGwillcross
withthetarget’sCOGwithintheInterceptionzone,
whichcouldcauseacollision.Youshouldalter
courseand/orspeedtoavoidthepotentialcollision.
Scenario1Coursechangeexamples
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4
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1.Coursealterationtopassaheadofthe
Interceptionzone—Proceedwithcaution,
thereisalwaysaninherentriskwhenpassingin
frontofothervessels.
2.Coursealterationtopassaheadofthetarget
vessel—Thismanoeuvreisnotrecommended
asyourvesselwillstillcrossthroughthetarget’s
Interceptionzone.
3.Coursealterationtopassasternofthetarget
vesselanditsInterceptionzone—This
manoeuvrealtersyourvessel’scoursesothat
itdoesnotcomeintocontactwiththetarget’s
Interceptionzoneandpassesasternofthe
target.
4.Coursealterationtopassclearasternofthe
targetvesselanditsInterceptionzone.Thisis
thepreferredmanoeuvreasitcorrectlyalters
yourvessel’scoursesothatitisclearofthe
target’sInterceptionzoneandpassessafely
asternofthetarget.Thismanoeuvrealso
clearlyshowsthetargetvesselofyourchange
ofcourse.
AIS(AutomaticIdenticationSystem)
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