Installation manual

SimradES70
3IncreasetheBottomBacksteplevel(makeitmorepositive).
Atypicalsettingwouldbeapproximately-30dB,butyouwillneedtoexperiment
tondthebestvaluefortheoperationalfrequencyandthecurrentbottomand
seaconditions.
TheES70willnowprovideincreasedpenetration,andshowyouadetectedbottom
thatisslightlydeeperthantheactualvalue.Thiswillcausetheatshtobeshown
asiftheywerelocated“above”thebottom.
4ClickOKtosavethecurrentsettingsandclosethedialog.
Adjustingthebottomdetectiontondseagrass
TheES70providestheBottomBackstepparameterintheBottomDetectordialog.Ifyou
haveanOlexsystem,youcanusethisparametertoenhancethedetectionofseagrass.
→Bottomslopesonpage120
1ClicktheActiveicon.
ThisiconislocatedundertheMainmenu.ItisusedtoopentheActive
menu.
→Activemenuonpage112
2OntheActivemenu,clickBottomDetectortoopentheBottomDetectordialog.
ThepurposeoftheBottomDetectordialogistodenetheupperandlowerdepth
limitsmostlikelytobeusedduringtheES70operation.Inthisdialog,youcanalso
modifythesettingforBottomBacksteptochangethebottomdetectionrelativeto
thebottomecho.
3DecreasetheBottomBackstepleveltoalowervalue(makeitmorenegative).
Atypicalsettingwouldbeapproximately-60dB,butyouwillneedtoexperiment
tondthebestvaluefortheoperationalfrequencyandthecurrentbottomand
seaconditions.
TheES70willnowshowyouadepthvaluethatisshallowerthantheactualdepth.
4ObservethetruedepthontheOlexsystem.
Thedifferencebetweenthetwodepthsindicatetheheightoftheseagrass.
5ClickOKtosavethecurrentsettingsandclosethedialog.
Settingupthedepthalarms
ThisprocedureexplainshowtosetupdepthalarmsontheSimradES70.
ThedepthalarmsprovidedbytheSimradES70fullstherequirementsmadebythe
InternationalMaritimeorganization(IMO)fornavigationalpurposes.
Analarmwillbetriggeredif:
athecurrentdepthisshallower
thantheminimum alarmdepthyouhavechosen,or
bthecurrentdepthisdeeper
thanthemaximum alarmdepthyouhavechosen
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