Furuno FCV-1200LM - Manual (Page 19)

1-9
USER 1, 2
The display set at the user 1 (user 2) menu appears. Default setting is as follows.
USER 1: Vertical split three screens (LF + HF + MIX)
USER 2: Vertical and horizontal split four screens (LF + HF + LF bottom lock +HF bottom lock
displays)
This setting may be changed through the menu. For further details see page 2-11.
0 HF 1/1 LF MIX
24.8
ft
0
10
20
30
40
0
10
20
30
40
0
10
20
30
40
High
frequency
Mix
display*
Low
frequency
User 1 display
*Mix
This mode compares echo intensity between low and high frequencies, and displays echoes
from tiny fish in discriminative colors. This is done by utilizing the fact that tiny fish return a
stronger echo against a high frequency rather than a low frequency. This is done as below.
1. If a high frequency echo is stronger than the corresponding echo on the low frequency, the
high frequency echo is displayed.
2. If the low frequency echo is stronger than or equal to the high frequency echo, it is less
likely to be a tiny fish and therefore is displayed in blue.
3. If the echoes on both frequencies have the intensity corresponding to reddish brown or red,
they are displayed in reddish brown or red: this is necessary to display the zero line and
bottom in reddish brown or red.
In other words, the echoes displayed in orange thru light-blue may be considered to be tiny fish
such as whitebait.