Installingthesonartrunk
6Ifrequired,stiffenthetrunkinboththefore-and-aftandathwartshipdirectionsby
weldingknee-platesbothtothetrunkandtothedoublingplate.
Protectingthesonartrunk
Purpose
Normally,asteelblisterisîš¿ttedforprotection.Theblisterisweldedtotheshellplating.
Theblistermaybeanopentype,oritcanbeîš¿lledwithoiltopreventcorrosion.Thislast
methodprovidesexcellentprotection,andsimpliîš¿esmaintenance.
Relatedtopics
•Sonartrunkinstallationprinciplesonpage59
Procedure
1Assoonasallinstallation,weldingandgrindinghasbeenperformed,primeorpaint
thetrunkandthesurroundingareausingaqualityprotectivecoating.
Sonartrunkinstallationprinciples
Observethetwodrawingsprovided.Theseillustratetheprincipalinstallationofthe
sonartrunk.
Topics
•Installationofatrunkwithopenblisteronpage60
•Installationofatrunkwithoillledblisteronpage61
381293/A
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