Installation manual

Basictheory
Deections
Onwarmdays–especiallyduringsummer–theseasurfacewill
beheatedbythesun,andthewatertemperaturewillgradually
decreasewithincreasingdepth.
Figure19Watertemperaturesonwarmdays
(CD015005G)
B
A
Whenthetemperaturedecreases(A)closertothebottom,the
sonarbeamisdeecteddownasindicatedbytheillustration.The
schoolofsh(B)youthoughtyouwouldseeisnotvisibleatall.
Oncolddays,youmayexperiencetheopposite:thecoldwater
willbeclosetothesurface,andthewatertemperatureincreases
withincreasingdepth.
Figure20Watertemperaturesoncolddays
(CD015005H)
B
A
Whenthetemperaturedecreases(A)closertothesurface,the
sonarbeamisdeectedupasindicatedbytheillustration.The
schoolofsh(B)youthoughtyouwouldseeisonceagainnot
visibleatall,andyouwillalsoseearingofsurfaceechoes.
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