Scenario1Speedchangeexamples
1
25 Kts
2
15 Kts
3
10 Kts
4
5 Kts
D13379-1
1.Speedingup
(1)
—Increasingvesselspeedto
passaheadofthetargetvessel.Proceedwith
caution,thereisalwaysaninherentriskwhen
passinginfrontofothervessels.
2.Nospeedchange—Notchangingspeedor
courseisnotanoptionasitcanresultina
collision.
3.Slowingdown—Slowingdownasufcient
amountwillallowthetargetvesseltopasssafely
aheadofyourvessel.
4.Slowingdown
(2)
—Slowingdownasufcient
amountwillallowthetargetvesseltopasssafely
aheadofyourvessel.
Note:
•
(1)
Inthisexamplethepathswillstillcrosswithin
theInterceptdistancesothegraphicsarestill
displayed.
•
(2)
Inthisexamplethepathswillnolongercross
withintheInterceptdistancesothegraphics
arenotdisplayed.
Examplescenario2—Targetvesselmoving
fasterthanyourvessel
Note:Thesescenariosareexamplesprovidedfor
guidanceonly.
Incertainsituations,whenthetargetvesselis
travellingfasterthanyourvessel,theremaybemore
than1opportunityforyourpathstocrosswithinthe
Interceptdistance.Ifthisisthecasethenasecond
Interceptionzoneisdisplayed.
1.1
st
—TherstInterceptionzone(displayed
closesttothetargetvessel)representsa
bow-to-bowcollision.
2.2
nd
—ThesecondInterceptionzone(displayed
farthestfromthetargetvessel)representsthe
targetvesselrunningyoudownfrombehind.
Whenalteringcourseandspeed,bothInterception
zonesmustbeavoided.
Scenario2Coursechangeexamples
1.Coursealterationtopassaheadofthe
Interceptionzone.Asthetargetvesselismoving
fasterthanyourvesselyouwillpassasternof
thetarget.
2.Coursealterationtopassaheadoftherst
Interceptionzone.Althoughthiscourse
alterationissufcienttoavoidapotential
bow-to-bowcollisionithascreatedasecond
Interceptionzonewherethetargetmaynowrun
youdownformbehind.
3.Coursealterationtopassbetweenthe2
Interceptionzones.Althoughthismayseemlike
thequickestoption.Proceedwithcaution,as
thegapbetweenthe2Interceptionzonescan
closequickly,especiallywhenyourvesselslows
down.
4.Coursealterationtoclearasternofthetarget
vesselanditsInterceptionzone.Thiswouldbe
thepreferredmanoeuvreasitcorrectlyalters
yourvessel’scoursesothatitisclearofthe
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