Raymarine A series - Page 320

1
3
2 4
D12219-1
ItemDescription
1
Safetarget
2Losttarget
3Dangeroustarget
4Targetbeingacquired
Safetynotices
MARPAcanimprovecollisionavoidancewhenused
wisely.Itisyourresponsibilitytoexercisecommon
prudenceandnavigationaljudgement.
Thereareconditionswhereacquiringatargetmay
becomedifcult.Thesesameconditionsmaybea
factorinsuccessfullytrackingatarget.Someofthe
conditionsare:
•Thetargetechoisweak.Thetargetisveryclose
toland,buoysorotherlargetargets.
•Thetargetoryourownvesselismakingrapid
manoeuvres.
•Choppyseastateconditionsexistandthetargetis
buriedinexcessiveseaclutterorindeepswells.
•Choppyseastateconditionsexistyieldingpoor
stability;ownvessel’sheadingdataisvery
unstable.
•Inadequateheadingdata.
Symptomsofsuchconditionsinclude:
•targetacquisitionisdifcultandtheMARPA
vectorsareunstable;
•thesymbolwandersawayfromthetarget,locks-on
toanothertarget,orchangestoalostsymbol
target.
Inthesecircumstances,targetacquisitionand
trackingmayneedtobere-initiatedandinsome
casesmightbeimpossibletomaintain.Betterquality
headingdatamightimproveperformanceinthese
circumstances.
HowaMARPAriskisassessed
Eachtargetismonitoredtoascertainwhetheritwill
bewithinacertaindistancefromyourvesselwithin
acertaintime.Ifso,thetargetisdesignatedas
dangerous,andanaudiblewarningissoundedand
awarningdisplayed.Thetargetsymbolchangesto
thedangeroustargetsymbolandashestoindicate
thatitisadangeroustarget.Acknowledgingthe
alarmwillremovethewarning.
Ifatargetislost,eitherbecausetheMARPAsoftware
haslostcontactwithit,orbecauseithasmoved
outofrange,anaudiblealarmissoundedandan
on-screenwarningappears.Theon-screensymbol
willchangetothetargetlostsymbol.Acknowledging
thewarningwillsilencethealarmandremovethe
on-screenwarningandthetargetlostsymbol.
EffectiverangeforMARPAtargets
MARPAtargetacquisitionisonlyavailableatradar
rangescalesofupto12nm,althoughtracking
continuesatallranges.
Ifyouchangetoasmallerrangescale,targetsmay
bebeyondtherangeofyourradarscannerand
willbelost.Insuchcases,anon-screenwarning
indicatesthatthetargetisoff-screen.
MARPAcontextmenu
TheMARPAfunctionincludesacontextmenuwhich
providespositionaldataandmenuitems.
Thecontextmenuprovidesthefollowingtarget
information:
•CPA
•TCPA
•COG
•SOG
Thecontextmenualsoprovidethefollowingmenu
items:
•Canceltarget
•CPAGraphic
•MARPAData
•Slewthermalcamera(Onlyavailablewhen
thermalcameraisconnectedandoperating.)
Accessingthecontextmenu
Youcanaccessthecontextmenubyfollowingthe
stepsbelow.
1.Non-touchscreenandHybridT ouchdisplays:
i.Selectingalocation,objectortargeton-screen
andpressingtheOkbutton.
2.HybridT ouchandT ouchonlydisplays:
i.Selectinganobjectortargeton-screen.
ii.Selectingandholdingonalocationon-screen.
Conguringtargetoptions
Fromtheradarapplication:
1.SelectMenu.
2.SelectTargets.
3.SelectTargetOptions.
320aSeries/cSeries/eSeries