InterpretingSideVisionâ„¢images
ThefollowingillustrationshowshowSideVisionâ„¢imagesonyourmultifunctiondisplayarerelatedtothe
watercolumnandseaoortothesidesofyourvessel.
InterpretingSideVisionimages
SideVisionâ„¢imagesareconstructedline-by-line,
similartothewayatelevisionpictureiscomposed
ofmanyhorizontallines.Eachsuccessiveping
fromtheSideVisionâ„¢transduceraddsanewline
ofimagedatatothetopofyourdisplay.Eachnew
lineshowssonarreturnsfromboththeportand
starboardsidesofyourvessel.
Asnewlinesareaddedwitheachsuccessive
ping,olderdatagraduallyscrollsdownthedisplay,
buildingupadetailedimageofthewatercolumnand
seaoortothesidesofyourvessel.Ifyourvessel
maintainsthesamebearingandspeedforaperiod
oftime,youcaninterprettheimageasaplanofthe
seaooralongyourvessel’scourse.
Theillustrationalsoidentiîš¿esexamplesoffeatures
thatmaybevisibleinSideVisionâ„¢images:
•Water:closetoyourvessel,theSideVision™
sonarbeamsmaynotinteractwithanysolid
objectsinthewatercolumnuntiltheyhitthesea
oor.Thewatercolumnclosetoyourvesselis
displayedasadarkbandintheimage.Theabrupt
changetoalightersectionintheimageindicates
wheretheseaoorisrstdetectedwitheachping.
•Baitball:objectsinthewatercolumnclosetoyour
vesselmaybedetectedbeforetheSideVisionâ„¢
beamshittheseaoor.Inthisexample,abaitball
isshownwithinthewatercolumn,atadistanceof
approximately30feetfromthevessel.
•Vegetation:objectsincontactwiththeseaoor
thatareclosetoyourvesselmaybeclearlyvisible
intheimageatthepointwheretheSideVisionâ„¢
beamshittheseaoor.Inthisexample,the
shapesintheimageindicatevegetationattached
totheseaoor.
•Structure:thelighterregionsoftheSideVision™
imagerepresenttheseaoor.Itmaybepossible
todetectdifferencesinthebottommaterial(for
example,whereanareaofmudmeetsanarea
ofgravel)aswellassolidstructuressuchas
pipelinesandpiers.Largersolidstructures,and
seaoorrelief,mayrevealanareaofshadow
directedawayfromyourvessel.
Note:UnlikeDownVisionâ„¢,SideVisionâ„¢does
notprovidedirectdepthreadings.Thescale
shownacrossthetopoftheimageindicatesthe
distanceoffeaturesfromyourvessel.
202
LightHousemultifunctiondisplayoperationinstructions
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