Raymarine e7 - Depth Offset

FishnderTransducerCalibration
Yourshndertransducermustbecalibratedcorrectlytoachieve
accuratedepthreadings.
ThemultifunctiondisplayreceivestheimagefromaDSMwhich
processessonarsignalsfromatransducermountedinthewater.
Ifthetransducerisequippedwithaspeedpaddlewheeland
temperature-sensingthermistor,theDSMcalculatesspeedand
temperature.T oensureaccuratereadings,itmaybenecessaryto
calibratethetransducer(s)byapplyingoffsetstodepth,speedand
temperature.AsthesesettingsareheldintheDSMandrelateto
thetransducer,theyareappliedsystem-wide.
DepthOffset
Depthsaremeasuredfromthetransducertotheseabed,butyou
canapplyanoffsetvaluetothedepthdata,sothatthedisplayed
depthreadingrepresentsthedepthtotheseabedfromeitherthe
keelorthewaterline.
Beforeattemptingtosetawaterlineorkeeloffset,ndoutthe
verticalseparationbetweenthetransducerandeitherthewaterline
orthebottomofthekeelonyourvessel,asappropriate.Thenset
theappropriatedepthoffsetvalue.
D9343--2
1 2 3
1
Waterlineoffset
2
Transducer/Zerooffset
3
Keeloffset
Ifanoffsetisnotapplied,displayeddepthreadingsrepresentthe
distancefromthetransducertotheseabed.
Settingthedepthoffset
Fromtheshnderapplication:
1.SelectMenu.
2.SelectSet-up.
3.SelectTransducerSet-up.
4.SelectDepthOffset.
5.UsetheRotaryControltoadjusttheoffsettotherequiredvalue.
Usingtheshnder
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