Navman Fish 4430 Installation And Operation Manual page 12

Shadows
Shadows are areas where the ultrasonic beam cannot 'see'. These
include hollows on the bottom or beside rocks and ledges where the
strong echo returned off the rock obscures the weaker echo of the
fish.
When looking for small objects including fish, users should consider
that there are places where fishfinders cannot 'see'.
Shadow - where objects are hidden in the bottom echo.
These fish will be hidden in the bottom echo.
NAVMAN fishfinders display the most recent events on the right of the screen.
Moving boat
1 minute ago
Air in water
(e.g. from
wake)
Fish 4430/4431 Installation and Operation Manual
30 seconds ago Now
When the fish symbol option
is ON, any echo returned
that fits the profile of a fish is
displayed on the screen with a
fish symbol.
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