Using
the numbered
keys, enter a numberforthe
upper
Iimitthat is at
least _________
ZOOM
Enlarging or"zooming"the picture is a common methpd usedto show small
detail and fish
signals.
The X-55A
gives you
two different zoom
sizes, plus
a
splitscreen
zoom
option.
The
zoom
operation and
adjustment
is different
in the automatic and manual modes.
ZOOM -
AUTOMATIC MODE
To zoom the
display
in
the automatic mode, first
press
the ZOOM key. All
targets
on the display are
enlarged four times normal size
automatically.
The menus shown below also appear.
Turn the zoom feature
on
(oroff) by pressing the
key adjacentto
the "OFF!
ON" label.
Pressing
the
key adjacentto
the "2X14X" label
enlarges
echoes
from two times
to four times their normal size.
To switch between the split
screen zoom and full screen
zoom, press
the
key adjacent
to the "SPLIT/FULL" label. The
screen instantly splits
into two
sections as shown at the
top
of
the next
page. Alltargets
on the
left side of the screen are shown
at four times the size of the
ones on the
right. If
you switch
to the 2X zoom mode,
echoes
on the left side of the screen are
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
Very
small fish probably
will not arch at all. Medium sized fish will show a
partial arch, ora
shape
similarto an
arch if
they're
in
deep
water. Largefish
will arch, but turn the sensitivity up in deeper
water to see the arch.
Because of water
conditions, such as
heavy
surface clutter, thermoclines,
etc.,
the
sensitivity sometimes cannot be increased enough to get fish
arches.
five feet less than the
lower limit. In this case, we entered 40, giving a 20
footzoom. When
you've
enteredthe desired upper limit, pressthe
up
arrow
key
at the bottom of
the screen. ________ ______________________
The unit returns to the sonar qg 3
screen with the new upper
limit. 0
Changethe lowerlimitthesame
way.
Usingtheupperand
lower
limits in this manner lets you
expand a segment of water
quickly
and
easily.
1
ENUMBERKEYSTO
USE RIGHT ARROW
TO BACKSPACE.
L ___
•12
29
36
q8
60
20
degree
TRANSDUCER CONE ANGLES
8
degree
16 37
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