Simrad SU90 - Mounting the Sonar Trunk

Installingthesonartrunk
Mountingthesonartrunk
Orientationofthesonartrunk
(CD015404-016)
Notethatthislinemustbeparallel
tothevessel’ scentreline.
Purpose
Thisprocedureoffersthegeneralstepsofthe
sonartrunkinstallation.Ifrequired,additional
proceduresprovidingmoreinformationmust
beprovidedbytheinstallationshipyard.
Prerequisites
Theinstallationshipyardmustprepareand
provideallrelevantresources.
Note
Theinstallationshipyardmustprovideall
necessaryinstallationdrawings,andifrequired,
thesemustbeapprovedbytheapplicable
authorities.
Relatedtopics
•Preparationsonpage37
•Determingthelocationofthehullunitonpage40
•Sonartrunkinstallationprinciplesonpage59
Procedure
1Denethelocationofthesonartrunk.
Thislocationmustbecarefullyselected.
Thedecisionmustbebasedonthegeneralprinciplesoutlinedinchapter
Preparationsonpage37andallrelevantknowledgeaboutthevesselconstruction
andthepracticalandtheoreticalnoisepatternsalongthehull.
2Notetheorientationofthecentrelineofthetrunkwithregardtothemountingbolts.
3Removethegasketonthetopangetoprotectitfromtheheat.
4Preparethelocation.
5Observetheseinstallationprinciples.
Important
aTheheightfromthetopofthetrunkangetotheundersideoftheprotection
blistermustbeselectedasshownintheguresinsectionSonartrunk
installationprinciplesonpage59.
bInordertoobtainoptimalsonarperformance,thetotalheightofthetrunkmust
beascloseaspossibletoitsstatedminimumheight.
cThetopangemustbeparalleltotheconstructionwaterlineinboththe
fore-and-aftandathwartshipdirections.
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