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A
BC
BOAT'S DIRECTION OF TRAVEL
A
B
C
Both 8 degree and 20 degree transducers give accurate bottom readings,
even though the bottom signal is much wider on the 20 degree model. This
is because you are seeing more of the bottom. Remember, the shallow
edge of the signal shows you the true depth. The rest of the signal tells you
whether you are over rocks, mud, etc.
if the cone passes over a fish in shallow water, the signal displayed on the
LMS-350A may not arch at all. This is due to the narrow cone diameter and
the resolution limitations of the display.
FISH ARCHES
Fish arches are created when the cone of sound passes over a fish. The
distance to a fish when the cone first strikes it is shown as “A” on the next
page. When the center of the cone strikes the fish, the distance is shorter
as shown “B”. As the cone leaves the fish, the distance increases again
as shown in “C”.
Very small fish probably will not arch at all. Medium sized fish will show a