Simrad ST90 - Page 14

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Thenarrowbeamopeningangle(6.5°@17kHz)andthehighsourcelevelmakestheST90
averypowerfulandhighresolutionlowfrequencysonar.Thenarrowbeamsprovided
bytheST90giveyouseveraladvantages.
•Theyincreasetherangeandresolution,andofferaverticalviewwithadditionaldetails
andaclearerpicture.
•TheymaketheST90evenmoreidealwhenyouneedtosearchforshclosetothesea
bottom,orclosetothesurface,atlongranges.
•Theyprovideafarbetterverticalviewwithless"bottomclimbing"thatwhatisseenon
sonarswithawiderbeam.
•Thenarrowbeamsalsodecreasethenoiselevel.
TheST90offersthesameuserinterfaceandoperatingsoftwareasourothersonars,echo
soundersandcatchmonitoringsystems.Thisenableseasierandfastertrainingofnewusers.
TheST90echopresentationsareoptimizedformultipledisplays.Providedthatyouhave
connectedadditionaldisplaystoyourProcessorUnit,youcanusetheDockingViews
functiontotakeanysonarviewandplaceitonaseparatedisplay.Whenyoumoveaviewto
anotherdisplay,itwillautomaticallybescaledforthebestpossibleresult.
Itiscommonforsonarstorequiremanypingstobuildthevariousviewsintheecho
presentation.Thesesonarsmayforexampleneedonepingtobuildthe360degreesomni
view,andthenseveraladditionalpingstofetchtheechoesfortheverticalviews.Onthe
ST90,allthesonarviewsinthepresentationarebuiltusingtheechoesfromonesingleping.
Thisdramaticallyimprovestheupdaterateandprovidesbetterreal-timeinformation.
TheST90permitsyoutorecordreal-timesonarsituations.Thisallowsyoutoreplay
completesequences.Theplaybackcontainstheexactsameechoinformation,andcanbe
usedformissionhistory,trainingortroubleshootingpurposes.
Greatemphasishasbeenplacedonanintuitiveuserinterfaceandthebestpossiblesonar
presentationsonahighresolutioncolourdisplay.
TheST90isequippedwiththecelebratedsignalprocessingsoftwaredevelopedby
KongsbergMaritime.TheST90offersseveralpulsetypes.ThisincludesHyperbolic
FM(HFM)transmissions.Thispulsetypeisalsoknownas"chirp".Itensuresaclutter
freepicturewithveryhighresolutioninrange.Thesignalprocessingandbeamforming
isperformedinafastdigitalsignalprocessingsystemusingthefulldynamicrangeof
thesignals.
SimradST90OperatorManual