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4. VIDEO SOUNDER OPERATION
4-5
Marker-zoom display
The marker-zoom display 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 the [ENTER] knob. The area between the VRM and zoom marker is
expanded. The length of the segment is equal to one division of the depth scale.
HF
80
42.0
MARKER-ZOOM
DISPLAY
Fish school
Fish
school
This part
is zoomed.
Zoom marker
VRM
(White on color model)
NORMAL
DISPLAY
50
0
100
-
-
-
-
-
-
-
-
-
-
-
42
44
46
48
50
-
-
-
-
-
0'20"
Marker-zoom display plus normal sounder display
Bottom-zoom display
The bottom-zoom display expands bottom and bottom fish echoes by the zoom
range selected on the sounder range setup menu (see paragraph 5.9.3). A
bottom displayed with a short echo tail usually means it is a soft, sandy bottom.
A long echo tail means a hard bottom.
HF
20.0
Bottom
NORMAL DISPLAY
Zoom marker
BOTTOM-ZOOM
DISPLAY
80
50
0
100
-
-
-
-
-
-
-
-
-
-
50
40
60
-
-
-
-
-
-
-
-
-
-
Bottom-zoom display plus normal sounder display
151


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