Furuno GP-1610CF Operator's Manual page 42

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.
Fish school
Marker zoom
100
display
150
162
200
CSE 180.0°
DEP 162m
POS 34° 26.245' N
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.
Bottom zoom
display
Bottom
162
Display is
CSE 180.0°
blown up DEP 162m
POS 34° 26.245' N
three times
larger than
normal display.
Figure 2-16 Bottom zoom display plus
normal display
2-6
Normal
0
display
Fish
school
50
VRM
(white)
90.0
100
This part
150
is zoomed.
200
200k
Expansion
2D
SPD 16.8kt
range
13:41
TMP 16.0 °C
marker
135° 41.232' E
(yellow)
0
100
Normal
40.0
display
50
120
100
140
Expansion
range
150 marker
160
(yellow)
200
200k
180
2D
SPD 16.8kt
14:02
TMP 16.0 °C
135° 41.232' E
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.
Bottom-lock
display
Fish
school
162
CSE 180.0°
DEP 162m
POS 34° 26.245' N
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.
68.3
Normal
display
160
200k
CSE 180.0°
DEP 160m
POS 34° 26.245' N
Figure 2-18 A-scope display (right side)
Expansion
This part
0
is zoomed.
range
50
marker
50
68.3 (yellow)
40
Fish
school
100 Normal
30
display
20
150
10
200
0
200k
2D
SPD 16.8kt
14:02
TMP 16.0 °C
135° 41.232' E
0
A-scope
50
display
100
150
200
2D
SPD 16.8kt
14:02
TMP 16.0 °C
135° 41.232' E