WIDTH
OF SIGNAL
INDICATES SIZE
OF FISH fiberglass
and
gel
coat are face of the transducer and the
Small
minnows or
bait fish
appear
on the
jlial
as thin
pale
lines.
If
they
are
tightly
schooled
they may
cover
a
depth
of from
five to ten
feet on
the
dial with
a few
pale
lines for
individual
minnows at the bottom
of the
school. Your
EAGLE will
indicate
even a
single
minnow
30
feet beneath
the
surface of
the water.
Obviously,
the back
of
a
big
fish
offers a
larger
surface to re-
flect the
signal
than
the
back of
a small
fish.
Consequently,
you
get
a
wider and
brighter signal
on
the
dial
and,
even
though
you
can't
tell the exact
size of the
fish from
the
signal,
it
does
give
you
a
good
clue
so that
you
can
instantly
tell
big
ones
from little
ones.
15
Fig.
19
exposed.
The transducer can
then be
epoxied
directly
to
this outer
layer. (See
Figure
5.)
When
epoxy
is
poured
into
the hole and the transducer
placed
into the
epoxy,
the hull
is still
structurally
rigid
and
no weak
points
are made.
2. The chosen area
should be
in
the aft one-third of the hull
on
planing boats,
and forward
of the
engines
and/or water
intakes in
displacement
hulls.
Water should flow
smoothly
in thjs area and it should
stay
in the water at all
speeds.
3. Before
permanently bonding
the tratisducer to
the
hull,
trial runs are
recommended
to find the
best
mounting
lo-
cation. Once an
area has been
determined to be a
good
spot
for the
transducer to be
mounted,
add some
water to
the
area,
and
place
the
trans-
ducer in it face
down. This
will
eliminate air between
the
4
hull.
Plug
the transducer into
the unit and turn the
depth
sounder on.
Operate
the boat
at all
speeds
and move the
transducer until the best loca-
tion is found for maximum
signal reception
and
minimum cavitation noise
(cavitation
is caused
by
water
turbulence and shows
up
as
narrow
signals
all around the
sonar
dial.)
4. If the chosen area is void of
potential problems,
sand the
surface of the hull and the
face of the transducer with
100
grit
sandpaper.
The
sur-
face must be
flat
enough
so
that
the
entire transducer
face is in contact
with the
hull
prior
to
bonding.
5. Build
a small dam
out of
caulking
compound
or model-
ing
clay
around
the chosen
area of
the transducer.
(Do
not
use
PLAY-DOH.)
(See
Figure
7.)
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