394149/C
45
Wheretoinstallthetransducer
Topics
Introduction,page45
Mountthetransducerdeep,page45
Avoidprotrudingobjects,page46
Stayfarawayfromthepropellers,page46
Chooseapositionfarawayfromthebowthruster(s),page47
Summaryandgeneralrecommendations,page47
Introduction
Asingleanswertothequestion“wheretoinstallthetransducer”cannotbegiven.
Thephysicallocationofthetransducerdependsonthevessel'sdesignandconstruction,how
thehullisshaped,andhowthewaterrunsalongthehull.Therearehoweveranumberof
importantguidelines,andsomeoftheseareevenconicting.
Note
Theinformationheremustbeconsideredasgeneraladvice.EachEK80installationmustbe
handledseparatelydependingonthehulldesign.
Mountthetransducerdeep
InordertoachievethebestpossibleEK80performance,mountthetransducerasdeepas
possibleunderthevessel’shull.
Considerthesituationswhenthevesselisunloaded,andwhenitispitchinginheavyseas.
Thereareseveralreasonsforthis.
1Theupperwaterlayersoftheseacontainamyriadofsmallairbubblescreatedby
thebreakingwaves.
Inheavyseastheupper5to10metresmaybelledwithair,andthehighest
concentrationswillbenearthesurface.Airbubblesabsorbandreectthesound
energy,andtheymayinworstcasesblockthesoundtransmissionaltogether.
Preparations
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