Furuno FCV-1900 - Bottom Discrimination Display Types

1. OPERATION
1-7
Bottom discrimination display
The bottom discrimination display has two modes: Bottom discrimination 1/2 and Bot-
tom discrimination 1/3. For how to change the mode, see page 2-4.
• Bottom discrimination 1/2 display
:
The bottom discrimination 1/2 screen shows the single frequency echo on the right
half of the screen and the bottom discrimination display occupies the left half of the
screen. The bottom discrimination display shows the bottom as a straight line, which
is useful for determining bottom hardness.
• Bottom discrimination 1/3 display
:
This display is similar to the bottom discrimination 1/2 display except the bottom dis-
criminator display occupies the bottom one-third of the left half of the screen as be-
low.
Bottom
discrimination 1/2
display
Single freq. display
*
*: Bottom tail
Long tail = Hard bottom
Short tail = Soft bottom
30.230.2
mm
0.0
0.0
0/99
x 1 x 1 x 1
VRM 0.0
LF: 2.0LF_BD
10
10
20
20
30
30
40
40
0
0
2
2
1
1
0
0
10
10
20
20
Bottom
discrimination 1/3
display
Single freq. display
*: Bottom tail
Long tail = Hard bottom
Short tail = Soft bottom
*
30.230.2
mm
0.00.0
x 1 x 1 x 1
LF: 2.0LF_BD
0/99 VRM 0.0
1010
2020
3030
4040
00
22
11
00
1010
33