Simrad SU90 - Compass Deviation; Noise Sources; Dry Docking; Approval by Classification Society

SimradSU90
Compassdeviation
Oncetheinstallationiscomplete,thevesselmustbeswungwiththesysteminboth
theoperativeandinoperativemodes.Theshipownerandcaptainareresponsiblefor
updatingthedeviationtableaccordinglywithregardtothevessel’snationalregistryand
correspondingmaritimeauthority.
Noisesources
Thevessel’shull,rudder(s)andpropeller(s)shouldbethoroughlyinspectedindrydock
priortoinstallation.
Roughnessbelowthewater-linedeformitiesintheshellplatingandprotrudingobstacles
cancreateunderwaternoise.Thesesourcesofturbulencemustbesmoothedorremoved
asbestaspossible.Itisespeciallyimportantthatthepropeller(s)isnotpittedordamaged.
Relatedtopics
•Acousticnoiseonpage47
Drydocking
Makesurethatampleclearanceunderthesonartrunkand/orprotectionblisteris
providedwhendrydockingthevessel.
Avoidlocatingsupportingblocksorstructuresinthevicinityofthisequipment.
Note
Thelocationofthesonartrunkmustbenotedonthevessel’ sdockingplanforfuture
reference.
Priortodrydocking,powerdownallhydroacousticsystems,andlabeleachsystem
accordinglytopreventaccidentalpoweron.
Removecircuitbreakersifnecessary.
Approvalbyclassicationsociety
TheSimradSU90sonartrunkinstallationmustbeapprovedbyDetNorskeVeritas
(DNV)oranotherclassicationsociety.
Theshipownerandshipyardperformingtheinstallationareresponsibleforobtaining
theinstallationapproval.
Supportinformation
IfyouneedtechnicalsupportforyourSimradSU90youmustcontactyourlocal
dealer,oroneofoursupportdepartments.Alistofallourdealersisprovidedon
http://www.simrad.com.
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