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NAVMAN
FISH 4430/4431Installatie- en bedieningshandleiding
· De helderheid van het water. Deeltjes of
lucht in het water verminderen de kracht
van de weerkaatste echo.
· De samenstelling of dichtheid van het
object of de bodem. Modder-, wier- en
zandbodems verzwakken en verspreiden
over het algemeen het sonarsignaal,
wat resulteert in zwakkere echo’s.
Harde bodems, zoals rots
en koraal, worden als brede
banden onderop het scherm
weergegeven
Zachte bodems, zoals modder,
zeewier en zand, worden als
dunne banden onderop het
scherm weergegeven
Kelp / zeewier
Grote vissen
Schaduwen
Schaduwen zijn gebieden waar de ultrasone straal niet kanzien,
zoals holten in de bodem of in de buurt van rotsen en richels waar
de sterke echo die terugkomt van de rots de zwakkere echo van de
vis versluiert.
Wanneer gezocht wordt naar kleine objecten, inclusief vissen, moet de
gebruiker er rekening mee houden dat er plaatsen zijn waar shfi nders
niet kunnen ‘zien’.
Deze vissen zullen verstopt zitten in de bodemecho.
Schaduw - waar objecten verborgen zijn in de bodemecho.
Rots- of koraalbodems concentreren het
weerkaatste signaal en produceren sterke
echo’s.
Opmerking: Planerende rompen produceren bij
hoge snelheid luchtbellen en turbulent water die
de transducer bombarderen. Het resulterende
ultrasone geruis kan worden opgevangen door de
transducer en zo de echte echo’s versluieren.
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