Kongsberg Simrad EK80 - Keep the Transducer Far Away from the Propellers; Mount the Transducer at a Safe Distance from Bow Thruster(S)

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Keepthetransducerfarawayfromthepropellers
Thepropulsionpropellersisthedominantnoisesourceonmostvessels.Thenoise
iseasilytransmittedthroughthewater.Thisnoisemayoftenreducetheoverall
performanceofyourEK80.
Thetransducermustbeinstalledasfarawayfromthepropellersaspossible.Thebest
positionsarethereforeontheforepartofthehull.Positionsoutsidethedirectlineof
sightfromthepropellersarebest.
Onsmallvesselswerecommendmountingthetransduceronthatsideofthekeelwhere
thepropellerbladesmoveupwards.Thisisbecausethepropellercavitationisweakest
onthatside.Thecavitationstartswhenthewaterowsinthesamedirectionasthe
propellerblades.Thisiswherethepropellerbladesmovedownwards.
Relatedtopics
Wheretoinstallthetransducer,page48
Preparations,page43
Mountthetransduceratasafedistancefrombowthruster(s)
Bowthrusterpropellersareextremelynoisy.Whenyoudecidewheretoplacethe
transducer,youmustconsiderthenoisecreatedbymostbowthrusters.
Wheninoperation,thenoiseandcavitationbubblescreatedbythethrustermaymake
yourEK80Widebandscienticechosounderuseless,almostnomatterwherethe
transducerisinstalled.Whenthebowthrustersarenotinoperation,thetunnelcreates
turbulence.Ifyourvesselispitching,thetunnelmaybelledwithairoraeratedwaterin
theupperpositionandreleasethisinthelowerposition.
Ingeneral,thetransducershouldthereforebeplacedwellawayfromthebowthruster(s).
However,thisisnotaninvariablerule.Certainthrusterdesigns-combinedwiththeir
physicallocationsonthehull-maystillofferasuitablelocationforthetransducer,even
closetothethruster.Ifyouareindoubt,consultanavalarchitect.
Relatedtopics
Wheretoinstallthetransducer,page48
Preparations,page43
Preparations