Simrad SU90 - Sonar Trunk Installation Principles; Protecting the Sonar Trunk

Installingthesonartrunk
6Ifrequired,stiffenthetrunkinboththefore-and-aftandathwartshipdirectionsby
weldingknee-platesbothtothetrunkandtothedoublingplate.
Protectingthesonartrunk
Purpose
Normally,asteelblisteristtedforprotection.Theblisterisweldedtotheshellplating.
Theblistermaybeanopentype,oritcanbelledwithoiltopreventcorrosion.Thislast
methodprovidesexcellentprotection,andsimpliesmaintenance.
Relatedtopics
•Sonartrunkinstallationprinciplesonpage59
Procedure
1Assoonasallinstallation,weldingandgrindinghasbeenperformed,primeorpaint
thetrunkandthesurroundingareausingaqualityprotectivecoating.
Sonartrunkinstallationprinciples
Observethetwodrawingsprovided.Theseillustratetheprincipalinstallationofthe
sonartrunk.
Topics
•Installationofatrunkwithopenblisteronpage60
•Installationofatrunkwithoillledblisteronpage61
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