2-6
Marker zoom display
This mode expands anywhere of the normal
picture to full vertical size of the screen on
the left-half window. You may specify the
portion to expand by operating the VRM
(Variable Range Marker), which you can shift
with ▲ or ▼. The segment between the VRM
and zoom range markers are expanded. The
length of the segment is equal to one division
of the depth scale.
200k
162
0
50
100
150
200
90.0
CSE 180.0° SPD 16.8kt
DEP 162m TMP 16.0 °C
2D
13:41
POS 34° 26.245' N 135° 41.232' E
100
200
150
Marker zoom
display
Fish school
Normal
display
Fish
school
This part
is zoomed.
Expansion
range
marker
(yellow)
VRM
(white)
Figure 2-15 Marker zoom display
plus normal display
Bottom zoom display
This mode expands bottom and bottom fish
echoes two to five times to vertical size of the
screen. This mode is useful for determining
bottom hardness. A bottom displayed with a
short echo tail usually means it is a soft, sandy
bottom. A long echo tail means a hard bot-
tom.
200k
162
0
50
100
150
200
40.0
CSE 180.0° SPD 16.8kt
DEP 162m TMP 16.0 °C
2D
14:02
POS 34° 26.245' N 135° 41.232' E
160
100
120
140
180
Display is
blown up
three times
larger than
normal display.
Bottom zoom
display
Bottom
Normal
display
Expansion
range
marker
(yellow)
Figure 2-16 Bottom zoom display plus
normal display
Bottom-lock display
The bottom-lock display provides a com-
pressed normal picture on the right half of the
screen and a 5 or 10 meter wide layer in con-
tact with the seabed is expanded onto the left
half of the screen. (You may select layer width
on the SOUNDER SETUP menu in the SYS-
TEM menu.) This mode useful for bottom
discrimination.
200k
162
0
50
100
150
200
68.3
CSE 180.0° SPD 16.8kt
DEP 162m TMP 16.0 °C
2D
14:02
POS 34° 26.245' N 135° 41.232' E
0
10
20
30
40
50
This part
is zoomed.
Fish
school
Bottom-lock
display
Fish
school
Expansion
range
marker
(yellow)
Normal
display
Figure 2-17 Bottom-lock display plus
normal display
Note: The expansion marker is not displayed
in the defualt setting. It may be turned on in
the SNDR SETUP menu in the SYSTEM
menu.
A-scope display
This display shows echoes at each transmis-
sion with amplitudes and tone proportional to
their intensities, on the right 1/3 of the screen.
It is useful for estimating the kind of fish
school and seabed composition.
200k
160
0
50
100
150
200
68.3
CSE 180.0° SPD 16.8kt
DEP 160m TMP 16.0 °C
2D
14:02
POS 34° 26.245' N 135° 41.232' E
Normal
display
A-scope
display
Figure 2-18 A-scope display (right side)