Simrad ES333-7C - INSTALLATION REV A Installation Manual

Installation manual

Simrad ES333-7C
333 kHz split-beam transducer

TECHNOLOGY FOR SUSTAINABLE FISHERIES

www.simrad.com

SimradES333-7C

Installationmanual

Thisdocumentprovidesageneraldescriptionofhowto
installtheSimradES333-7CSplit-beamtransducer.The
informationmustberegardedasgeneralguidelinesand
recommendationsonly.Theinstallationshipyardmust
designandmanufactureinstallationhardwaretotthe
ES333-7Ctransduceroneachindividualvessel.

329786/A

21January2009

Documenthistory

Documentnumber:329786/ISBN-13:978-82-8066-104-3

Rev.AJanuary2009

Firstversion.

Copyright

©2009KongsbergMaritimeAS
TheinformationcontainedinthisdocumentremainsthesolepropertyofKongsbergMaritimeAS.Nopart
ofthisdocumentmaybecopiedorreproducedinanyformorbyanymeans,andtheinformationcontained
withinitisnottobecommunicatedtoathirdparty,withoutthepriorwrittenconsentofKongsberg
MaritimeAS.Thedocument,oranypartofit,maynotbetranslatedtoanyotherlanguagewithoutthe
writtenapprovalfromKongsbergMaritimeAS.

Disclaimer

KongsbergMaritimeASendeavourstoensurethatallinformationinthisdocumentiscorrectandfairly
stated,butdoesnotacceptliabilityforanyerrorsoromissions.

Warning

Theequipmenttowhichthismanualappliesmustonlybeusedforthepurposeforwhichit
wasdesigned.Improperuseormaintenancemaycausedamagetotheequipmentand/orinjury
topersonnel.Theusermustbefamiliarwiththecontentsoftheappropriatemanualsbefore
attemptingtoinstall,operateorworkontheequipment.
KongsbergMaritimeASdisclaimsanyresponsibilityfordamageorinjurycausedbyimproper
installation,useormaintenanceoftheequipment.

Support

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Installationmanual

Tableofcontents

ABOUTTHISMANUAL.......................................................5

SIMRADES333-7C............................................................6

WHERETOMOUNTTHETRANSDUCER...............................7

HOWTOINSTALLTHETRANSDUCER..............................12

Transducerinstallationinblister............................................................................12

Transducerinstallationinboxkeel.........................................................................17

Transducerushmountedinasteeltank...............................................................19

Transducerwithacousticwindow..........................................................................20

Transducermountedinsidethehull.......................................................................21

Transducermountedonadropkeel.......................................................................23

Retractabletransducer............................................................................................24

TRANSDUCERCABLEGLANDSANDSPLICING.................25

Aboutcableglands.................................................................................................25

Cableglandforsteelhulls......................................................................................26

CableglandforwoodenandGRPhulls.................................................................27

Cableglandsforsmallhulls...................................................................................28

Transducercablesplicing.......................................................................................29

Ordernumbers........................................................................................................29

STEELCONDUIT..............................................................30

TRANSDUCERHANDLINGANDMAINTENANCE................31

Rulesfortransducerhandling.................................................................................31

Approvedanti-foulingpaints..................................................................................31

Usingself-lockingtaps...........................................................................................32

DRAWINGFILE...............................................................36

Echosounderconnections......................................................................................36

Splicingthetransducercable.......................................................................36

GeneralPurposeTransceiver(GPT)wiring...................................................37

GeneralPurposeTransceiver(GPT)transducerplugassembly.......................38

Outlinedimensionsandinstallationdrawings........................................................39

Outlinedimensions[318747].......................................................................40

Recommendedarrangement[204678]..........................................................41

Mountingring[204449]..............................................................................43

Clampingring[204451]..............................................................................45

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Aboutthismanual

ABOUTTHISMANUAL

Purpose

Thepurposeofthisinstallationmanualistoprovidegeneric
descriptionsandillustrationsallowingthereadertounderstand
thebasicprinciplesforechosoundertransducerinstallation.

Abouttheinformationprovidedinthisdocument

Theinformationinthisdocumentmustberegardedasgeneral
guidelinesandrecommendationsonly.Theinstallationshipyard
mustdesignandmanufactureinstallationhardwaretoteach
individualtransducerandvessel.

Approvalbymaritimeauthorities

Wheneverrequired,theinstallationshipyardmustalsohavethe
installationapprovedbytheapplicablemaritimeauthorities.

Additionalinformation

Foradditionaldetailedinformationaboutthetransducerto
beinstalled,refertothedocumentationprovidedwiththe
transducer.Drawingsanddescriptionscanalsobeobtainedfrom

h

t t p : / / w w w . s i m r a d . c o m .

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SimradES333-7C

SIMRADES333-7C

Thepurposeofthismanualistheprovidethebasicinformation
requiredtoinstalltheSimradES333-7CSplit-beamtransducer.

Transduceranddocuments

•SimradES333–7C:322598

•Productspecication:329781

•Documents:

–Outlinedimensions:318747

–Mountingring:871-204449

–Clampingring:871-204451

–Mountingarrangement:820-204678

Note

Althoughdrawingsareprovidedtoexplaintheinstallation
principles,theinstallationshipyardmustprovidethenal
drawingsrequiredtotthetransducertoeachindividual
vessel.Also,whenapplicable,theinstallationshipyard
musthavethedrawingsandinstallationapprovedbythe
propermaritimeauthorities.Thedrawingsspecicfor
theES333-7CtransducerarelocatedintheDrawingle
onpage36.

Technicalspecications

RefertotheES333-7Cproductspecication.

Additionalpartsprovidedforinstallation

ThefollowingitemscanbesuppliedbySimradtofacilitate
installation:

•Mountingring:ES2–204464

•Clampingring:ES2–200879

•Transducercable(forextension):642–078215

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Wheretomountthetransducer

WHERETOMOUNTTHETRANSDUCER

Asingleanswertothequestionwheretolocatethetransducer
cannotbegiven.Itdependsverymuchonthevessel’s
construction,howthehullisshapedandhowthewaterruns
alongthehull.Therearehoweveranumberofimportantguide
lines,andsomeoftheseareevenconicting.

Mountthetransducerdeep

Mountthetransduceratadeeppositiononthehull.Considerthe
situationswhenthevesselisunloaded,andwhenitispitching
inheavyseas.

Thereareseveralreasonsforthis.

1Theupperwaterlayersoftheseacontainamyriadofsmall

airbubblescreatedbythebreakingwaves.Inheavyseasthe
upper5to10metresmaybelledwithair,andthehighest
concentrationswillbenearthesurface.Airbubblesabsorb
andreectthesoundenergy,andtheymayinworstcases
blockthesoundtransmissionaltogether.

2Anotherreasontogodeepisthecavitationinfrontof

highpowertransducers.Cavitationistheformationof
smallbubblesinthewaterduetotheresultinglocal
pressurebecomingnegativeduringpartsoftheacoustic
pressurecycles.Thecavitationthresholdincreaseswiththe
hydrostaticpressure.

3Thetransducermustneverbeliftedfreeofthewatersurface.

Transmittingintoopenairmaydamagethetransducer
beyondrepair.Mountingthetransduceratadeepposition
onthehullpreventsthis.

4Ifthetransducerisliftedupfromthewaterduringheavy

seas,itmaybedamagedwhenthehullstrikesbackatthe
seasurface.Thisisespeciallyimportantforlowfrequency
transducerswithlargefaces.

Mountthetransducermidwaybetweenthebow
andthesterntoavoidheaveeffects

Heaveistheupanddownmovementofthevessel.Itdisturbsthe
echotracesintheechogram,sothataatbottomisdisplayed
asawave.Atransducerlocationinthemiddleofthevessel
minimisestheinuenceofvesselrollandpitch.

Mountthetransducerawayfromprotruding
objectsonthehull

Objectsprotrudingfromthehull,suchaszincanodes,sonar
transducersoreventhevessel’skeel,generateturbulenceand
ownoise.Holesandpipeoutletsarealsoimportantnoise
sources.Theymayactasresonantcavitiesamplifyingtheow

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SimradES333-7C

noiseatcertainfrequencies.Donotplaceanechosounder
transducerinthevicinityofsuchobjects,andespeciallynot
closebehindthem.Forthesamereason,itisveryimportant
thatthehullareaaroundthetransducerfaceisassmoothand
levelaspossible.Eventracesofsealingcompound,sharpedges,
protrudingboltsorboltholeswithoutllingcompoundwill
createnoise.

Mountthetransducerattheforwardpartofthe
hulltominimisetheeffectsfromtheboundary
waterlayer

Whenthevesselforcesitswaythroughthesea,thefriction
betweenthehullandthewatercreatesaboundarylayer.The
thicknessoftheboundarylayerdependsuponvesselspeedand
theroughnessofthehull.Objectsprotrudingfromthehull,and
dentsinthehull,disturbtheowandincreasethethicknessof
theboundarylayer.Theowinthisboundarylayermaybe
laminarorturbulent.Alaminarowisanicelyordered,parallel
movementofthewater.Aturbulentowhasadisorderlypattern,
fullofeddies.Theboundarylayerincreasesinthicknesswhenthe
owgoesfromlaminartoturbulent.Thegurebelowillustrates
theboundarylayerofavesselmovingthroughthewater.

Figure1Boundarywaterlayer

ATurbulentow

BLaminarow

CAirbubblesinthewater

Furthermore,airbubblesintheseawaterarepresseddownbelow
thehullandmixedintotheboundarylayer.Theboundarylayer
isthinunderneaththeforwardpartofthevessel,andincreasesin
thicknessasitmovestowardsaft.Ifthesidesofthehullaresteep,
someoftheairbubblesintheboundarylayermayescapetothe
seasurfacealongthevesselsides.Itisourexperiencethatawide

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Wheretomountthetransducer

andatbottom,witharisinganglelessthanaround13degrees,
ispronetogivingairproblemsforthetransducer.Inanycasea
transducerlocationintheforwardpartofthehullispreferredin
ordertominimisetheinuenceoftheboundarylayer.

Mountthetransducerfarawayfromthepropellers

Thepropulsionpropelleristhedominantnoisesourceonmost
shingvessels,researchvessels,merchantvesselsandpleasure
crafts.Thenoiseistransmittedthroughtheseawater.For
thisreason,thetransducershouldbeplacedfarawayfromthe
propeller,whichmeansontheforepartofthehull.Positions
outsidethedirectlineofsightfromthepropellerarefavourable.
Onsmallvesselswithshortdistancesitisadvisedtomountthe
transduceronthatsideofthekeelwherethepropellerblades
moveupwards,becausethepropellercavitationisstrongeston
theotherside.Thecavitationstartsmosteasilywhenthewater
owsinthesamedirectionasthepropellerblade,andthatisto
somedegreethecaseatthatsideofthekeelwherethepropeller
bladesmovedownwards.

Mountthetransducerfarawayfromthebow
thrusters

Bowthrusterpropellersareextremelynoisy .Wheninoperation,
thenoiseandcavitationbubblescreatedbythethrustermake
theechosounderuseless,almostnomatterwherethetransducer
isinstalled.Andwhennotinoperation,thetunnelcreates
turbulence,andifthevesselispitching,thetunnelmaybelled
withairoraeratedwaterintheupperpositionandreleasethisin
thelowerposition.Ingeneral,alltransducersmustbetherefore
placedwellawayfromthebowthruster.However,thisisnot
aninvariablerule.Certainthrusterdesignscombinedwithits
physicallocationonthehullmaystilloffersuitabletransducer
locationsnearthethruster.Ifyouareindoubt,consultanaval
architect.

Mountthetransducerwithaslightlyinclined
transducerface

Ideally,thetransducerfaceshouldbemountedinparallelwiththe
seasurfacewhenthevesselisinnormaltrim,asthiswillprovide
themostaccurateechoinformation.However,itisalsovery
importantthatthew

a t e r  o w overthetransducerfaceislaminar.
Inordertoensurelaminarow ,thetransducerfacemaybetilted
slightlyupwardsinrelationtothewaterow.Thisallowsthe
owingwatertomeetthefacedirectly ,andassureslaminarow .
Theinclinationanglemusthoweverbedeterminedcarefully.The
anglemustbesmallontransducerswithnarrowbeamangles.As
aruleofthumb,mounttransducerswithbeamanglessmaller
thansevendegreeswithminimuminclinationangle.Thesmaller

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SimradES333-7C

beamangleyourtransducerhas,thesmallertheinclinationangle
canbe.Ensurethatyoudonotmountthetransducerwitha
negativeinclinationangle.Thismaycauseturbulenceunderthe
transducerface,andreducedechosounderperformance.

Summaryandgeneralrecommendations

Someoftheaboveguidelinesareconicting,andeachcasehas
tobetreatedindividuallyinordertondthebestcompromise.
Generallythepropellernoiseisthedominantfactor,anda
recommendedtransducerlocationisintheforepartofthehull,
withmaximumdistancefromthebowequaltoonethirdofthe
totallengthofthehullatthewaterline.

Figure2Generalrecommendationfortransducerlocation

ATransducer

BInclinationangle

CHulllengthatwaterline

DMaximum1/3ofthehulllengthatwaterline(C)

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Wheretomountthetransducer

Ifthevesselhullhasabulbousbow ,thismaywellbeagood
transducerlocation,butalsoheremustbetakenintoconsideration
theowpatternoftheaeratedwater.Oftentheforemostpart
ofthebulbispreferable.

Figure3Recommendedlocationofthetransduceronabulbous
hull

AThruster

BTransducerlocation

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SimradES333-7C

HOWTOINSTALLTHETRANSDUCER

Therearemanydifferentwaystomountthetransducer.These
aretherecommendedmethodstomountacirculartransducer.

Transducerinstallationinblister

Withatransducerwithcircularhousing,onerecommended
installationmethodisbyusingablister.Thetransducerblister
mustbedesignedandmanufacturedbytheinstallationshipyard
totthevessel’ssizeandhullshape.

Usemountingandclampingringswhenever
provided

Circulartransducersmaybeprovidedwithmountingand
clampingrings,orwithdrawingstoallowforlocalproduction
ofthese.Themountingringisweldedtotheholepreparedfor
thetransducer,whiletheclampingringtsaroundtheedgeof
thetransducerbody .Boltsthroughtheclampingringintothe
mountingringwillsecurethetransducerbetweenthem.Note
thatseveraltransducersusedirectionguidestoallowcorrect
mounting.

Smoothsurfaceisimportant

Mountingscrewsorboltsmustnotbeextrudingfromthe
transducerortheareaimmediatelyaroundit.Makesurethatthe
surfaceofthetransducerface,theinstallationhardwareusedto
mountit,thehullplatingandtheputtyaroundthetransduceris
asevenandsmoothaspossible.Obstructionsonthesesurfaces
willcreateproblemswithturbulentow.

Useahorizontalsupportbaronlargetransducers

Werecommendthatlargetransducersarettedwithahorizontal
supportbar.Thepurposeofthissupportbaristoprotectthe
transducerfromdamageintheeventofslamming.Thishappens
ifthevesselhullclimbsoutofthewaterinheavyseas.Theforce
ofthewaterwhenthehullfallsdownmaypushthetransducer
upandcausedamagetoitsmounting.Thesupportbarcanbe
securedtothemountingringusingthreadedrods.

[1]

1.Slammingistheimpactofthebottomstructureofashipontotheseasurface.Itismainlyobserved
whilesailinginwaves,whenthebowraisesfromthewaterandsubsequentlyimpactsonit.Slamming
inducesextremelyhighloadstoshipstructuresandistakenunderconsiderationwhendesigningships.
(Wikipedia)

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Howtoinstallthetransducer

Example:Largetransducer

Theillustrationbelowshowsatypicaltransducerblisterdesigned
foralargetransducer.Notethatduetothephysicalsizeof
thetransducer,aU-shapedsupportbar(E)isusedtosupport
thetransducer.Thepurposeofthissupportistopreventthe
transducerfrombeingpushedupintotheblisterinheavyseas.

(CD017010A)

H

E

E

K

G

B

D

A

C

F

J

I

AStreamlinedblister

BStiffeningrib

CDrainageholes

DInclinationangle

EU-shapedsupportbar(onlargetransducers)

FForward

GCableserviceloop

HStufngtube

IMinimum400mm

JRoundedcorners

KAiroutlet

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SimradES333-7C

Example:Smalltransducer

Theillustrationbelowshowsatypicaltransducerblisterdesigned
forasmalltransducer.Thesameblisterdesignprinciplesasfora
largetransducerapply .

E

E

A

C

G

D

F

B

(CD017010B)

AStreamlinedblister

BMountingring

CClampingring

DGuide

EAiroutlet

FForward

GTransducercable

Notethatthetransducercablemustbeprovidedwithacableloop
insidetheblister.Observetheverticalforwardedgeoftheblister.
Thiswillguidethewatertoeachsideoftheblister.

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