User manual

Functionsanddialogs
Parameters
1StartRange
Thisparametercontrolsthestartdepthofyourechogram.
Example18StartRangeandRangeinbottomrelatedechogram
Inabottomechogram,settheStartRangevalueto–5meters.Thiswillmake
theechogramstartfrom5metersabovethebottom.SetRangetothe5meters
plus10=15meters.Theechogramwillnowshowtheareafrom5meters
abovethedepth,anddownto10meters“below”thebottom.Thebottom
contourwillappearasaatline.
Example19StartRangeinasurfaceechogram
Inasurfaceechogram,settheStartRangevalueto10meters.Thiswillmake
theechogramstartfrom10metersbelowtheseasurface(providedthatthe
transduceroffsethasbeendened).SetRangetothecurrentdepthplus20
meters.Theechogramwillnowshowtheareafrom10metersbelowthesea
surface,anddownto10meters“below”thebottom.Thebottomcontouris
easilydetectedwhenthedepthchanges.
Example20StartRangeinapelagicechogram
Inapelagicechogram,settheStartRangevalueto20meters.Thiswillmake
theechogramstartfrom20metersbelowtheseasurface(providedthatthe
transduceroffsethasbeendened).SetRangeto40meters.Theechogram
willnowshowtheareafrom20metersbelowtheseasurface,anddownto
60metersbelowthetransducer.Providedthatthedepthislargerthan60
meters,thebottomcontourisnotshown.
2AutomaticStartDepth
CheckthisboxtomaketheES70chooseanautomaticstartdepth.Thisfunctionis
usedonsurfacerelatedechogramswhenaxedrangeischosen.Thefunctionwill
makesurethatthebottomcontourisalwaysshowninyourechogram,nomatter
howmuchthewaterdepthchanges.
Whenthisfunctionisenabled,youarenotabletochangethestartrangevalue.The
valueshowninthebuttonistheonechosenbytheES70tomakesurethatthe
bottomechoisshown.
Example21AutomaticStartDepth
IfyousetRangeto20metersandenabletheAutomaticStartDepthfeature,
yourechogramwillalwaysbedrawntomakethebottomcontourappearclose
tothebottomofyourechogrampresentation.Ifthewaterdepthexceeds20
meters,theES70willautomaticallymovethestartrangedown.Therangeis
kept,butasthestartrangeismoved,thebottomcontourisstillvisible.
338106/C
161