Simrad ST90 - About the Installation Trunk

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Abouttheinstallationtrunk
Theinstallationtrunkprovidesthephysicalfoundationfortheentirehullunit.The
installationtrunkpenetratesthehull.Itisthereforeacrucialpartofthehullunit
assembly.InordertoensureproperST90operation,thephysicallocationofthe
installationtrunkmustbecarefullyselected.
TheST90Fishndingsonarcanbeprovidedwithoneofthefollowinghullunits.
HullUnit
Partnumber
Loweringdepth
Transducercable
Maximumspeed
4414864.6m ST92
441488
1.2m
7m
21knots
4385204.6m ST93
441490
1.6m
7m
16knots
4414924.6m ST94
441494
2.1m
7m
11knots
Outlinedimensionsdrawings:
-ST92:447567
-ST93:435546
-ST94:447545
Thesametransducerisusedonallhullunittypes.Thesameinstallationtrunkisusedon
allhullunittypes.
Note
Theinstallationtrunkisnotusedwhenagate
valveismounted.Theinstallationtrunkisthen
replacedwithatransducerdock.
Theinstallationtrunk-withablindange-
canbeorderedfromKongsbergMaritimeas
anoptionaldelivery.Asanalternative,the
installationtrunkcanbemanufacturedbythe
shipyardbasedonthedrawingsinthismanual.
Alocallymanufacturedinstallationtrunkcanbe
adjustedtobettertthepropertiesofthevessel’s
hull.
Theinstallationtrunkisnotusedwhenagate
valveismounted.Theinstallationtrunkisreplacedwithatransducerdock.
Note
TheoptionalinstallationtrunkofferedbyKongsbergMaritimeisapprovedbyDet
NorskeV eritas(DNVGL),andincludesablindangeandarubbergasket.Ifthe
installationtrunkismanufacturedlocally,theinstallationshipyardisresponsiblefor
obtainingtheapprovalcerticatesfromtherelevantnationalregistry.
SimradST90InstallationManual