Name: Simrad ST90
Brand: Simrad
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457420/A

Rulesfortransducerhandling

Atransducermustalwaysbehandledasadelicateinstrument.Incorrectactionsmaydamage

thetransducerbeyondrepair.Aphysicalblowtothetransducerfacemayeasilydamageone

ormoreelements.Observethesetransducerhandlingrules:

•Donotactivatethetransducerwhenitisoutofthewater.

•Donothandlethetransducerroughlyandavoidimpacts.

•Donotexposethetransducertodirectsunlightorexcessiveheat.

•Donotdamagetheouterprotectiveskinofthetransducer.

•Donotusehigh-pressurewater,sandblasting,metaltoolsorstrongsolventstoclean

thetransducer.

•Donotsteponthetransducercables.

•Donotdamagethetransducercables,andavoidexposuretosharpobjects.

Systemdescription

TheSimradST90isalongrangeandlowfrequencyshndingsonarwitha360degrees

coverage.TheST90isdesignedformediumandlargesizedshingvessels.

Ifhighperformanceisyournumber1criteriawhenchoosingasonar;suchaslongrange,

highresolution,narrowbeamsandhighsourcelevels,thisisyournaturalchoice.Wemade

nocompromisesduringthedesignoftheST90.Ourgoalwassimplytomaketheultimate

highperformanceshndingsonar.WiththeSimradST90,weuselowerfrequencies

thantheSX90andSU90sonars.Inordertoachievethis,acompletelynewtransducerhas

beendesigned.EachelementislargerthanthepreviousSX90andSU90elements,butthe

numberofelementsisthesameastheSU90.Thisallowsforthesamenarrowbeam,and

ultimatelyalongerrange.TheST90hasbeendesignedtosearchwithverylongrangesinall

weatherandseaconditions.Whetheritisheavyweather,hardbottom,openwaters,weak

targets-allechoesarehandledbytheST90duetothefullystabilizedandverynarrow

beamscombinedwiththecuttingedgesignalprocessing.

Thecentreoperationalfrequencyis19kHz,butyoucanselectanyoperationalfrequency

from14to24kHzinstepsof1kHz.Thecylindricalmulti-elementtransducerallows

theomnidirectionalsonarbeamstobetiltedelectronicallyfrom-10to+84degrees.This

allowsyoutoautomaticallytrackschoolsofsh,andtoobservethewholewatervolume

aroundthevessel.

TheST90providesanumberofstandardinterfacelinesforcommunicationwithperipheral

devicesandsensors.Typicalinputsaregeographicalinformationfromapositioningsystem,

vesselspeedandcurrentheading.Bydefault,theST90usesabuilt-inmotionsensor.For

improvedoperationalaccuracy,anexternalmotionreferenceunit(MRU)canbeconnected.

SimradST90

Simrad ST90 User Manual

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