Simrad EK15 - Checking the Echogram Settings

Gettingstarted
Checkingtheechogramsettings
Purpose
Thisprocedureexplainshowyoucancontroltheechogramviews,selectanechogram
tomakeit“active”,andcheckand-ifnecessary-changetheparametersettingsfor
theechogram.
Relatedtopics
•Displayorganizationonpage104
•StatusBaronpage128
•DisplayOptionsdialogboxonpage166
•Echogramdialogboxonpage206
•TVGgainonpage275
Procedure
1ObservetheEK15echogram.
Ifyouhavetwoormorechannels(transducers/frequencies),observethetabson
theStatusbar.
2Clickoneofthetransducertabs.Observethatonlytheechogramfromtheselected
frequencychannelisshown.
Bydefault,twoechogramsareshownforeachfrequencychannel.Thetop
echogramissurfacerelated,whilethebottomechogramisbottomrelated.Several
echogramtypesareprovided.
aSurface
Theechogramisrelatedtotheseasurface.Startdepth(upperechogram
boundary)andverticalrange(acrossechogram)aremanuallyselectedbythe
StartDepthandRangebuttonsontheMainmenu.
Thebiomassisautomaticallycalculatedbasedonchoicesyoumakeinthe
CalculationIntervaldialogbox;withinagiventimeframe,adenednumber
ofpings,oraportionoftheechogramview.Thedataisthentakenfroman
echoareastartingimmediatelyafterthetransmitpulse,andendingjustover
thedetecteddepth.
Ifyouhavelimitedyourverticalrange(usingtheRangeandStartRange
settings),theresultingareaisusedforthebiomasscalculation.Iftheseabed
isclearlydenedwithauniquebottomdetection,thebottomechowillnot
be
includedinthecalculations.Therefore,ifyouswitchthebottomdetectoroff,
thebottomechowillbeincludedinthecalculation.
bBottom
Theechogramisrelatedtothedetectedbottom.Stopdepth(lowerechogram
boundary)andverticalrangearemanuallyselectedbytheStartDepthand
RangebuttonsontheMainmenu.Theechogramisonlydrawnforpingshaving
asuccessfulbottomdetection.
ThebiomasscalculationismadeinthesamewayasforSurfaceechograms.
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