Raymarine a68 WiFi User Manual

19.2Sonartechnologies
Traditionalsonartechnology
Traditionalsonarusesasinglecarrierfrequencyor
carrierwaveforthesonarping.Thesonarworksby
measuringthetimeittakesthepingechotoreturnto
thetransducertodeterminetargetdepth.
D12600-2
CHIRPtechnology
CHIRPsonarsuseasweptfrequency'CHIRP'signal
whichcandistinguishbetweenmultipleclosetargets,
thisenablesthesonartodisplaymultipletargets
insteadoflargecombinedtargetsthatyouwouldsee
whenusingtraditionalnon-CHIRPsonar.
BenetsofCHIRPincludeimprovementstotarget
resolution,bottomdetectioneventhroughbaitballs
andthermoclinesanddetectionsensitivity.
D12601-2
CHIRPSonaroverview
CHIRPsonarproducesaconicalshapedbeam,the
coverageoftheconicalbeamisthewatercolumn
directlybeneaththevessel
Conicalbeam
D12784-2
Sonariseffectiveatarangeofspeeds.Indeeper
waterstheCHIRPbandwidthisautomatically
optimizedtoimprovebottomlockandthedetection
ofmovingobjects(e.g.sh)inthewiderwater
column.
CHIRPsonarscreenexample
CHIRPDownVision
TM
overview
DownVision
TM
producesawide–angleside-to-side
beamandathinfore-to-aftbeam.Thecoverageof
theDownVision
TM
beamisawatercolumndirectly
beneathandtothesidesofthevessel.
DownVision
TM
beam
D12777-2
264aSeries/cSeries/eSeries

Raymarine a68 WiFi Specifications

General

Brand	Raymarine
Model	a68 WiFi
Category	Marine Equipment
Language	English