Simrad ST90 - Page 97

442703/B
95
Note
Allinformationrelatedtopracticalandtheoreticalnoisepatternsalongthehull
mustbetakenintoconsideration.
2Adaptthemountingangetotthehull.
Alternatively,designandmanufactureacustommountingange.
Note
Keeptheheightofthemountingangeassmallaspossible,asthiswillincrease
theoperationaldepthofthetransducer.
3Cutoutaholeinthevessel’shullwithadiameterlargeenoughtoaccommodatethe
mountingange.
Theexactsizeoftheholemustbedeterminedbytheinstallationshipyard.
4Orientatethemountingangecorrectly,andwelditintoposition.
Note
Themountingangemustbemountedsothatitstopmatingsurfaceisinparallel
withtheseasurfaceduringnormaloperatingconditions.
5Checktheuppersurfaceofthemountingangetoensurethatitislevel,undamaged
andclean.
6Covertheuppersurfaceofthemountingangewithawoodenplatetoprotectit
7Addsupportframesandstiffenerstosecuretheconstruction.
8Dependingontheshapeofthehull,werecommendthatyoutasteelblisterfor
protection.
Theblistermustbedesignedbytheinstallationshipyard.Itmustbeweldedto
theshellplating.Theblistermaybeanopentype,oritcanbelledwithoilto
preventcorrosion.Thislastmethodprovidesexcellentprotection,andsimplies
maintenance.
Note
Makesurethatthehullplatingsurroundingthemountingangeisevenandsmooth
withoutprotrudingobjectsthatcancausenoise.Objectsprotrudingfromthehull
willgenerateturbulenceandownoise.ThiswillreducetheST90performance.If
necessary,grindandpolishallsurfaces.
9Assoonasallinstallation,weldingandgrindinghasbeendone,primeorpaintthe
mountingangeandthesurroundingareausingahighqualityprotectivecoating.
InstallingtheoptionalgatevalveDN500