Furuno GP-1850WDF - Manual (Page 19)

2. VIDEO SOUNDER OPERATION
2-3
Selecting sounder display mode
There are five display modes from which to
choose: normal, marker zoom, bottom zoom,
bottom lock and A-scope. To select a display,
press the SNDR FUNC soft key on the
normal sounder display to show the sounder
function window, and press ▲ or ▼ to select
the display. Press the RETURN soft key to
close the window.
SOUNDER FUNCTION
▲
NORMAL
MARKER ZOOM
BOTTOM ZOOM
BOTTOM LOCK
A-SCOPE
▼
Sounder function window
Marker zoom display
This mode expands a selected area of the
normal sounder 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 area between
the VRM and zoom marker is expanded.
200k
202
0
50
100
150
90.0
100
200
150
Marker zoom
display
Fish school
Normal
sounder
display
Fish
school
This part
is zoomed.
Zoom marker
VRM
GPS3D
200
Marker-zoom display plus
normal sounder display
Bottom-zoom display
This mode expands bottom and bottom fish
echoes to vertical size of the screen, and is
useful for observing the bottom shape.
200k
0
50
100
150
40.0
160
100
120
140
180
Bottom zoom
display
Bottom
Normal
sounder
display
Zoom
marker
DGPS3D
162 200
Bottom-zoom display plus
normal sounder display
Bottom-lock display
The bottom-lock display provides a
compressed normal picture on the right half
of the screen and a 3 or 6 meters (10 or 20
feet) wide layer in contact with the bottom is
expanded onto the left half of the screen.
200k
34.0
68.3
0
2
4
6
This part
is zoomed.
Fish
school
Bottom-lock
display
Fish
school
Zoom
marker
Normal
sounder
display
GPS3D
Bottom
display flat
0
40
50
30
20
10
Bottom-lock display plus
normal sounder display
Note:
The zoom marker is not displayed in
the default setting. It may be turned on
in the DISPLAY SETUP2 menu. For
further details see “ZOOM MARKER”
on page 11-5.