DownVision
TM
iseffectiveatlowervesselspeeds.In
deeperwaterstheCHIRPbandwidthisautomatically
optimizedtoimprovebottomlockandthedetectionof
movingobjects(e.g.sh)inthewiderwatercolumn.
Thewide,thinbeamproducescleartargetreturns.
TheuseofCHIRPprocessingandahigheroperating
frequencyprovideamoredetailedimage,making
iteasiertoidentifybottomstructuresaroundwhich
shmayreside.
CHIRPDownVision
TM
screenexample
CHIRPSideVision™overview
SideVision™interpretssignalsfromapairof
side-lookingtransducersandbuildsupadetailed
underwaterviewasyourvesselmovesforward.
Thetransducerssendpulsesofsoundwavesinto
thewateroneachsideofyourvessel,andrecord
thesoundwavesthatreectoffthebottom,andoff
objectsonthebottomorsuspendedinthewater
column.Thereceivedechoesareaffectedbythe
bottommaterial(forexamplemud,gravelorrock),
andbyanyotherobjectsintheirpath(forexample
cablesontheseaoor,bridgepiers,wrecks,shoals
orsh).
SideVision™producestwowide–angleside-to-side
beams,eachwithathinfore-to-aftbeam.The
coverageoftheSideVision™beamsisaswathon
eachsideofthevessel.
SideVisionbeams
SideVision™iseffectiveatlowervesselspeeds.
Thewide,thinbeamsproducecleartargetreturns.
Asyourvesselmovesforward,subsequentreturns
builduptoprovideanimageoftheseaooroneach
sideofyourvessel.
TheuseofCHIRPprocessingandahighoperating
frequencyprovideadetailedimage,makingiteasier
toidentifybottomstructuresaroundwhichshmay
reside.Thenarrowanglethebeamsmakewiththe
bottomatlongerrangescanrevealtheshadowsof
structuresthatprotrudefromthebottom.
CHIRPSideVision™screenexample
Note:The“Depth”gureshownintheillustration
aboveassumesthatyouhaveadeviceinyour
systemthatprovidesdepthdata.Pleasebeaware
thatnotalltransducersand/orsonarmodules
supportdepthsensing.Formoreinformation,refer
tothelatestspecicationsanddocumentation
availableforyourparticularproductsonthe
Raymarinewebsite(www.raymarine.com).
Fishnderapplication
265
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