Garmin Fishfinder 340C, Руководство пользователя

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4 Fishfinder 340C Owner’s Manual
G
ETTING
S
TARTED
> U
NDERSTANDING THE
F
ISHFINDER AND
S
ONAR
Suspended
targets
Bottom
Surface
clutter
Water
depth
Depth
scale
The strongest sonar returns appear on your screen as the most
intense solid color (depending on your selected color scheme; red
is the default). The weakest returns appear as the less intense, less
solid colors (blue is the default).
The bottom of the water is always going to be the strongest
signal, and therefore the most intense color. The bottom is the
continuous, intensely-colored line running across the bottom of
the screen. The Fishfinder 340C includes the latest technology in
interpreting bottom signals; it can see through fish, structures, and
thermoclines (shown in the weakest colors). Large schools of fish
or dense structures close to the bottom can affect water depth return
readings.
NOTE: If the Fishfinder is unable to track the bottom for any
reason, the digits which indicate depth flash on and off to alert
you that the Fishfinder is not tracking the bottom.
Along the top of the screen, you might see a grouping of intense
colors. This area is surface clutter, which can be caused by waves
or any other sonar interference at the surface of the water. Too
much surface clutter can obscure your view of fish. You can turn
down the Gain setting to reduce this surface clutter.
Between the bottom and the surface clutter, you see suspended
targets in the previous illustration. Here, the targets appear as
arches. Actual suspended target returns might not always appear
as perfect arches, due to the speed, fish orientation, or other
conditions. You can turn on the Fish Symbols setting if you want to
see suspended targets indicated by a fish shape.
The strength of the sonar return can also help you interpret the
hardness of the bottom of the water. The thicker the bottom line,
the harder the bottom.
Hard Structure Soft Structure