Simrad ST90 - Controlling Gain and Range Settings

442703/B
59
Choosingthebestlocationforthehullunit
Topics
Aboutthehullunitlocation,page59
Deningtheforeandaftlocationofthehullunit,page60
Deningtheathwartshipslocationofthehullunit,page61
Importantconsiderationsrelatedtonoise,page61
Aboutthehullunitlocation
Selectingthebestpossiblelocationforthehullunitisofvitalimportancefortheoverall
ST90performance.Thehullunitlocationmustbeselectedbyaskilledengineerwith
experienceinsonartheoryandhullunitinstallation.Simradwillassistifrequired.
Note
Theinformationheremustbeconsideredasgeneraladvice.EachST90installationmust
behandledseparatelydependingonthehulldesign.
ThephysicallocationoftheST90hullunitdependsonthevessel'sdesignand
construction,howthehullisshaped,andhowthewaterrunsalongthehull.Observethe
followingconsiderations:
1Thesonarroomchosenforthehullunitlocationmustbeaccessibleunderall
conditions.
2Theaccesstothesonarroommustbelargeenoughtoallowinstallationandremoval
ofthehullunitwithoutdisassemblingit.
3Heatingisaneffectivemethodforreducinghumidity.Theheaterinthesonarroom
mustdimensionedtomaintaintheequipmentwithinitsenvironmentaltolerances.
Typicalheatingpowerisminimum1000W.Theheatermustbeinstalledcloseto
thedeck.
4Ifitisnotpossibletoconnectthesonarroomtothevessel'sbilgepumpsystem,a
separatebilgepumpforthecompartmentmustbeinstalled.
5Thesonarroommustbeconnectedtothevessel'sventilationsystemtoensurea
supplyofcoolingair.Ifthevesselislikelytooperateintropicalconditions,anair
dehumidierisstronglyrecommendedtoreducethelikelihoodofcorrosiondueto
condensation.
Preparations