Simrad ST90 - Hull Unit Installation Example: Side View

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Hullunitinstallationexample:Sideview
Thehullunitislocatedinthesonarroom.Thisexampleshowsatypicalsonarroom
andhullunitseenfromtheside.Thehullunitismountedonthecentreaxisofthe
vessel,ontopofthekeel.
AFixingpointforlifting
apparatus(Minimumload
capacityis2000kg.)
BAirbleedingpipe(The
minimumdiameteris1/4"
(6.35mm).)
CAirventpipes(The
minimumdiameteris1/2"
(12.7mm).)
DAccesshatch
ELamp
FMechanicalsupport
brackets
Duetoitsheightand
weight,thehullunit
gantrymustbesecured
tothebulkheadbymeans
ofmechanicalsupport
brackets.
GTransceiverUnit
HHeater
IThreeorfourknee-plates
(stiffeners)mustbewelded
totheframesordecks.
Stiffentheinstallation
trunkinboththe
fore-and-aftand
athwartshipdirections
byweldingstrengthening
knee-platesbothtothe
trunkandtothedoubling
plate.
Relatedtopics
Installingthehullunit,
page124
Hullunitinstallationoverview,
page125
Installingthehullunit