Installation manual

SimradES70
Thebiomassisautomaticallycalculatedbasedonchoicesyoumakeinthe
CalculationIntervaldialog;withinagiventimeframe,adenednumberof
pings,oraportionoftheechogramview.Thedataisthentakenfroman
echoareastartingimmediatelyafterthetransmitpulse,andendingjustover
thedetecteddepth.
Ifyouhavelimitedyourverticalrange(usingtheRangeandStartRange
settings),theresultingareaisusedforthebiomasscalculation.Iftheseabed
isclearlydenedwithauniquebottomdetection,thebottomechowillnot
be
includedinthecalculations.Therefore,ifyouswitchthebottomdetectoroff,
thebottomechowillbeincludedinthecalculation.
→Biomassinformationpaneonpage97
bBottom
Theechogramisrelatedtothedetectedbottom.Stopdepth(lowerechogram
boundary)andverticalrangearemanuallyselectedbytheStartDepthand
RangebuttonsontheMainmenu.Theechogramisonlydrawnforpingshaving
asuccessfulbottomdetection.
ThebiomasscalculationismadeinthesamewayasforSurfaceechograms.
cPelagic
ThisechogramisnearlyidenticaltotheSurfaceechogram.However,the
biomassiscalculatedinadifferentmanner.
Thebiomasscalculationsarenotrestrictedbythebottomdetection.This
meansthatthebottomechowillbeincludedincalculationsifitappearswithin
thechosenrange.
Example1Biomasscalculation
Ifyouareinvestigatingalargeschoolofpelagicsh,settheStartRange
andRangetoenclosetheschool.Iftheschoolislargeenough,aSurface
echogrammaymistakeitforbottom,andthebiomassreadingswill
bewrong.ThePelagicechogramwillhoweverdisregardthebottom
detection,andgiveacorrectestimateofthebiomass.
dTrawl
Thisechogramcoverstheverticalopeningofthetrawl.
Theechogramisonlydrawnwhentrawlpositioninformationisavailable.
ThebiomasscalculationismadeinthesamewayasforSurfaceechograms.
3Movethecursorovertheechogram.
Observethatarectangular“tooltip”labelisshown.Itprovidesinformationabout
theechoesatthecursor'spresentposition.Whichinformationtoincludeinthelabel
isdenedintheDisplayOptionsdialog.
4ClicktheHorizontaltab.Observethattheechogramchannelsareshown
horizontally.
5ClicktheVerticaltab.Observethattheechogramchannelsareshownvertically.
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