2. SYSTEM MENU
27
About the mix display
The mix display compares echo intensity be-
tween low and high frequencies, and displays
echoes from tiny fish in discriminative colors.
This is done by utilizing the fact that tiny fish
return a stronger echo against a high frequen-
cy rather than a low frequency. It works as fol-
lows.
• If a high frequency echo is stronger than the
corresponding echo on the low frequency,
the high frequency echo is displayed.
• If the low frequency echo is stronger than or
equal to the high frequency echo, it is less
likely to be a tiny fish and therefore is dis-
played in blue.
• If the echoes on both frequencies have the
intensity corresponding to reddish-brown or
red, they are displayed in reddish brown or
red. This is necessary to display the zero
line and bottom in reddish-brown or red.
In other words, the echoes displayed in or-
ange thru light-blue are considered to be tiny
fish such as whitebait.
Zoom Mode:
Select the zoom display to
show, among bottom lock, bottom zoom,
marker zoom, discrim 1/2 and discrim 1/3.
See sec. 1.4.3 “Zoom display”.
Target Echo:
Set fishing objective.
Normal
is
for general purpose fishing.
Surface
is for de-
tecting surface fish. Pulse repetition rate is
higher than "Normal" on the 1kW and 2kW
transducers that are programmed into the
menu.
Squid
detects squid and other individ-
ual fish. These items are automatically set: Tx
Pulse, Short 1; Echo Stretch, ON, and
Smoothing, Off.
Deep Sea
is the same as
Normal.
Nav Data Disp:
Turn the nav data display On
or Off and select character size, from large or
small.
Nav Data:
Select the quantity of nav data to
show, at the upper left corner of the display.
The choices are two, three and four items, as
shown below.
2.2.2
Selecting data for nav
data displays
1. Operate the [MODE] control to select
USER-1 or USER-2, whichever is set up
to show nav data.
2. Use
S
or
T
to select a data display win-
dow.
3. Use
W
or
X
to select the nav data item to
display. Availability depends on how
R-BRN
Low frequency
High frequency
YEL
GRN
BLU
BLU
BLU
Discriminator
R-BRN
These echoes
are likely to be
small fish.
Displayed in blue
since high freq.
echo is weaker.
YEL
Displayed in reddish-
brown since high
freq. echoes are
red or reddish brown.
ORG
GRN
RED
+
49.6
m
MANUAL
L:2.0/H:2.0
LF/HF/MIX
1/2
STBD
20
40
60
0
20
40
60
0
STBD
Nav data display
SPEED(STW)
WIND
True
