Kongsberg Simrad EK80 - Page 262

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394149/D
•Thevesselisberthedoratsea.
Inordertodothistest,theshipmustbe"silent".
•Thewatermustbeasdeepaspossible.Recommendedminimumdepthis100metres.
•Theremustbenoothervesselsinthevicinity.
•Thevesselmustliestillinthewater.
•Asmuchmachineryaspossiblemustbeturnedoff.Itisparticularlyimportantto
turnoffelectricalmotors,aswellascoolingsystemsandhydraulicpumpsthatmay
causeelectricnoise.
•Topreventinterference,allotherhydroacousticinstrumentsmustbeturnedoff.
Note
Thistestmustbeconsideredasindicative.Withthevesselinport,theenvironmental
conditionsarenotsatisfactory.Intheshallowwatersoftheport,noisefromother
vessels,dockyardworkersormachinerywillcauseunreliabletestresults.Ifyoudo
thistestsinabusyharbour,orwithnoisesourcespresent,thesensitivereceiverswill
detectallthenoiseinthenearbywaters.
Neithertoolsnorinstrumentsarerequired.
Context
Itisessentialthatthenoisesignatureisaslowaspossible.YourEK80mustbesetto
Passivemode.
Procedure
1ToselectPassivemode,usetheNormalOperation
dialogbox.
aOpentheOperationmenu.
bSelectNormalOperation.
cFortherelevanttransceiverchannel,set
ModetoPassive.
dSetPulseDurationto1.024ms.
eSelectOKtosavetheselectedsettingandclosethedialogbox.
Note
IfyousetModetoPassive,yourEK80willnolongerprovideanyinformationin
theechogram(s).
2EnabletheNoisetooltip.
aOpentheDisplaymenu.
bSelectDisplayOptionstoopenthedialogbox.
SimradEK80InstallationManual