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Furuno COLOR VIDEO PLOTTER 1933C User Manual

Page 149

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4. VIDEO SOUNDER OPERATION


4-5

200k

80

42.0

MARKER-ZOOM
DISPLAY

Fish school

Fish
school

This part
is zoomed.

Zoom marker

VRM

NORMAL
DISPLAY

50

0

100

-

-

-

-

-

-

-

-

-

-

-

50

60

70

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

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),
and 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
bottom.

200k

20.0

Bottom

NORMAL DISPLAY

Zoom marker

BOTTOM-ZOOM
DISPLAY

80

50

0

100

-

-

-

-

-

-

-

-

-

-

0

10

20

30

--

--

--

--

--

--

-

Bottom-zoom display plus normal sounder display

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