Specifications

SimradSH90
Deections
Onwarmdays–especiallyduringsummer–theseasurfacewillbeheatedbythesun,
andthewatertemperaturewillgraduallydecreasewithincreasingdepth.
Figure10Watertemperaturesonwarmdays
(CD015005G)
B
A
Whenthetemperaturedecreases(A)closertothebottom,thesonarbeamisdeected
downasindicatedbytheillustration.Theschoolofsh(B)youthoughtyouwould
seeisnotvisibleatall.
Oncolddays,youmayexperiencetheopposite:thecoldwaterwillbeclosetothe
surface,andthewatertemperatureincreaseswithincreasingdepth.
Figure11Watertemperaturesoncolddays
(CD015005H)
B
A
Whenthetemperaturedecreases(A)closertothesurface,thesonarbeamisdeectedup
asindicatedbytheillustration.Theschoolofsh(B)youthoughtyouwouldseeisonce
againnotvisibleatall,andyouwillalsoseearingofsurfaceechoes.
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