Simrad ST90 - Requirements for Watertight Integrity

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regularintervalstochecktemperatureandhumidity,andtakethenecessaryactions
iftheenvironmentalconditionsarepoor.
ObservetheenvironmentalspecicationsrelatedtotheST90units.
Relatedtopics
Sonarroomrequirements,page66
Requirementsforwatertightintegrity
Thesize,locationanddesignofthesonarroommustfullalltherequirementstothe
vessel’swatertightintegrity.
Intheeventofamajorleak,itmustbepossibletocloseallwatertighthatchesand/or
doorstotheroomtomaintainvesselstabilityandsafety.
Thephysicalsizeofthesonarroommustbelimited,sothatintheeventofamajorleak,
theoodingoftheroomwillnotinduceinstability,orcausethevesseltocapsizeorsink.
Inspectallwatertightdecksandbulkheadsperiodically.Makesurethatthereareno
unprotectedopeningsorimproperpenetrationsthatmayallowprogressiveoodingfrom
thecompartment.Makesurethatthewatertightdoorsandhatchesareinplaceand
ingoodworkingorder.
Installandactivatebilgehighlevelsensorstoprovideanearlywarningofabnormal
accumulationofwater.Positionthesensorsaslowaspossiblealongthecentreareaof
thecompartment,and/orinotherlocationswherethewaterwillgravitatetorst.Inspect
thebilgesensorsperiodically.
Allcablesleadinginandoutofthesonarroommustberuninsteelconduits.Thesesteel
conduitsmustreachupandabovethefreeboarddeck.
Ifrequired,alldesigndocumentsrelatedtothesonarroomandthewatertightintegrity
mustbeapprovedbythevessel’snationalregistryandcorrespondingmaritimeauthority
and/orclassicationsociety.Suchapprovalmustbeobtainedbeforetheinstallationcan
begin.Theshipownerandshipyarddoingtheinstallationareresponsibleforobtaining
andpayingforsuchapproval.
Relatedtopics
Sonarroomrequirements,page66
Preparations