Raymarine C140w - Page 126

thedangeroustargetsymbolandashestoindicatethatitisa
dangeroustarget.Pressingtheappropriatesoftkeywillsilencethe
alarmandremovethewarning.
Ifatargetislost,eitherbecausetheMARPAsoftwarehaslost
contactwithit,orbecauseithasmovedoutofrange,anaudible
alarmissoundedandanon-screenwarningappears.The
on-screensymbolwillchangetothetargetlostsymbol.Pressingthe
appropriatesoftkeywillsilencethealarmandremovetheon-screen
warningandthetargetlostsymbol.
EffectiverangeforMARPAtargets
MARPAtargetacquisitionisonlyavailableatradarrangescalesof
upto12nm,althoughtrackingcontinuesatallranges.
Ifyouchangetoasmallerrangescale,targetsmaybebeyondthe
rangeofyourscannerandwillbelost.Insuchcases,anon-screen
warningwillindicatethatthetargetisoff-screen.
StatussymbolsforMARPAtargets
Eachtargetisshownintheradardisplayasasymbol,which
indicatesitsstatus:
D7542_2
Dangerous target
Safe target
Target being acquired
Lost target
Vesselvectors(CPAgraphics)overview
CPAgraphicsshowvectorsforyourvesselandaselectedtarget.
Avectorisalineon-screenshowingthepredictedcoursesofyour
vesselandtheselectedtargetifyoubothremainonyourpresent
course.Thesevectorsvaryinlengthduetovesselspeedandvector
lengthsetintheMARPASetupmenu.
D9008_1
Vector
CPA graphic
3 9
Truemode
WiththedisplaysetinTruemode,thevectorsofyourvesseland
thetargetareshownextendedtotheirintersectionpoint.The
CPAisshownasalinethatisplacedonyourvessel’svectorat
thepointoftheCPA.Thelengthanddirectionofthelineindicates
thedistanceandbearingofthetargetatCPA.Thetextindicates
CPAandTCPA.Thetextnexttothetargetsymbolindicatesitstrue
courseandspeed.
Relativemode
WiththedisplaysetinRelativemode,novectorextensionofyour
vesselisshown.TheCPAlineemergesfromyourownvessel,with
thetargetvectorextensionbeingshownasrelative,nottrue.The
textnexttothetargetindicatesitscourseandspeed.
SettingupMARPA
Intheradarapplication:
1.PresstheTARGETTRACKINGsoftkey.
2.PresstheMARPAANDAISOPTIONSsoftkey.
126C-SeriesWidescreenuserreference