Furuno FCV-1200LM - Manual (Page 14)

1-4
1.4 Presentation Mode
Seven presentation modes are available with the [MODE] switch.
LF-ZOOM
LF
HF
HF-ZOOM
USER-1
USER-2
DUAL
Currentry selected mode
shown in reverce video
M O D E
Display mode window
Single picture (low frequency or high frequency)
Low frequency (LF)
The lower the frequency of the ultrasonic pulse the wider the detection area. Thus, the low
frequency is suitable for general search and judging bottom condition.
High frequency (HF)
The higher the frequency of the ultrasonic pulse the better the resolution. Therefore, the high
frequency pulse is useful for detailed observation of fish echoes.
Low
frequency
LF
49.6
1/1
ft
0.0
20
40
60
80
0
0
Fish school
Bottom
High
frequency
Detection Area
Single Picture
Comparison of detection ranges, sample single picture (low frequency)