Simrad SU90 Installation Manual

Preparations
Hullunitorientationexample
Hullunitorientationexamples
(CD015408-003)
BOW
Thehullunitshould
normallybeorientedwith
thehoisting/loweringmotor
pointingaft.Ifthisorientation
makestheMotorControlUnit
attachedtothehullunitdifcult
toaccessformaintenance
purposes,thehullunitmaybe
orientedinthemostsuitable
position.
Thedistancebetweenthehull
unitandtheTransceiverUnit
islimitedbythelengthofthe
transducercable.
Irrespectiveofthehullunit
orientation,thetransducershall
notbemechanicallyaligned.
Transduceralignmentis
performedintheSU90ProcessorUnitbyrotatingtheechopresentationonthedisplay.
Relatedtopics
•Alignmentofthesonarpictureonpage193
Acousticnoise
Aswithanyotherhydroacousticsystems,thequalityoftheSU90presentationsare
subjecttounwantednoise.Theechoesfromsinglesh,schoolsandothertargetsmust
bedetectedinsidethenoise.
Itisthereforeimportantthatwekeepthisnoiselevelaslowaspossibleinordertoobtain
longrangeanddependableinterpretation.Evenwiththeadvancednoiselteringoffered
bytheSU90,wemustaddressthenoisechallengeduringtheplanningandpreparations
forthesysteminstallation.
•Contributingnoisefactorsonpage48
•Selfnoiseonpage49
•Ambientnoiseonpage51
•Fishinggearnoiseonpage51
•Electricalnoiseonpage52
•Reverberationonpage52
•Somemeanstoreducethenoiseonpage52
381293/A
47

Simrad SU90 Specifications

General

Brand	Simrad
Model	SU90
Category	Sonar
Language	English