Specifications

STYLUS
REPLACEMENT
CAUTION
—
High voltage
is
pre-
sent
in the electronic section
when
the unit is turned on.'
1. TURN THE UNIT OFF.
2. Release both catches on the
top
of the case. Pull
out
and
down on the
top
of the case
front to
expose
the
stylus
belt.
(See Figurel8.)
3.
The
stylus
belt rides over two
wheels located at the
right
edge
of the
platen assembly.
Move the front of the belt
DOWN to
position
the
stylus
at
the center of the
platen.
4. Hold the
stylus
belt
stationary
with one
finger,
and remove
the old
stylus by starting
at its
left
edge
and
moving
it out
from under the tabs on
the
sty-
lus holder.
5. Before
installing
the new
sty-
lus,
be sure it is bent
properly
by
camparing
it to
Figure
28.
6. Refer to
Figure29to
be
sure
the new
stylus
is
positioned
correctly
under the tabs
on the
holder. Be sure
it moves
freely
in the two slots. If
not,
bend
the
stylus away
from the
edge
it is
rubbing
on until
it does
move
freely.
7. After
installing,
if the
stylus
won't
print
all,
the
way
down
the
paper
as
shown in
Fig-
ure3O,
bend the
right leg
down
so that
more
pressure
is ex-
erted
against
the stainless
steel
plate.
If it still does not
print
all the
way,
bend the left
leg
down more
(but
not so far
that
it
digs
into the
paper).
8. Close
the front of the case.
Latch both catches on the
top
of
the case.
EAGLE is that it can record indi-
vidual fish with a characteristic
arched mark that
separates
them
from their
stationary
surround-
ings.
The reason for this is shown
below. The distance to a fish
when it moves into the sonar's
cone of sound is shown
as "A" in
Figurel6.
When the fish has
moved
to the center of the
cone,
the distance to it will be
shorter,
(line "B"),
and as it moves
out of
the
cone,
the distance will in-
crease
again
as
shown in line
"C". If a
partial
arch occurs most
of the time on
your
unit
(the
mark
curves
up,
but does not curve
back down or
vice-versa),
it is be-
cause the transducer is not aimed
straight
down.
Sharp,
well-defined
signatures
will occur most often when the
Sensitivity
knob is set at the ¾
point,
or
higher. (See
"A",
Fig-
urel7).
Remember, too,
that there
must be some movement be-
tween the fish and boat to de-
velop
the arched mark.
Thermoclines
The
temperature
of water in the
lake is seldom constant from
top
to bottom.
Layers
of different tem-
peratures
form,
and the
junction
of
a warm and cool
layer
of water
is called a thermocline. The
depth
and thickness of the thermocline
can
vary
with the season or time
of
day.
In
deep
lakes there
may
be two or
more,
at different
depths.
Thermoclines are
impor-
tant to the fisherman because
they
are areas which fish are ac-
tive.
Many
times bait fish will be
above the thermocline while lar-
ger game
fish
suspend just
below
it. See
"B",
Figure
17.
Your EAGLE Mach
1 can detect
this invisible
layer
in the
water,
but the
Sensitivity
knob
will
prob-
ably
have to be set at the 1/2
point,
or
higher.
PAPER
LOADING
CAUTION
—
High voltage
is
pre-
sent in the electronic section
when the unit is turned on.
1. TURN THE UNIT OFF.
2. Release both catches on the
top
of the case. Pull out and
down on the
top
of the case
front to
expose
the
platen
as-
sembly. (See Figurel8.)
3. Move the
stylus
belt
DOWN,
to
position
the
marking stylus
on the back side of
the
pla-
ten. NEVER move
the belt
up
Figure
17
Figure
27
12 .
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