Furuno FCV-585 Operator's Manual page 12

2. Rotate the MODE knob again to choose the
display mode desired.
The screen you chose appears soon there-
after.
Single frequency display
Low frequency (50 kHz)
The sounder uses ultrasonic signals to detect
bottom conditions. The lower the frequency of
the signal, the wider the detection area. There-
fore, the 50 kHz frequency is useful for general
detection and judging bottom condition.
High frequency (200 kHz)
The higher the frequency of the ultrasonic
signal, the better the resolution. For this reason
the 200 kHz frequency is ideal for detailed
observation of fish schools.
Frequency and coverage area
Picture advance speed
Gain
Range
Minute
G:AF R:A
marker
(Each bar
15.5 kt
equals
82.6
30 sec.)
Fish school
Data
box
Color
Bottom
bar
49.6
Depth
Single frequency display
Dual frequency display
The 50 kHz picture appears on the left; the 200
kHz picture on the right. This display is useful for
comparing the same picture with two different
frequencies.
50 kHz
200 kHz
Display mode
50k 1/1
0
0.0
Transmission line
Alarm icon
20
Range scale
40
60
m
80
G:AF R:A
0
50 kHz
picture
20
40
60
47.2
m
80
Dual frequency display
Beam
Frequency
width
50 kHz Wide
200 kHz Narrow
Zoom display (50/200 kHz)
Zoom mode expands chosen area of the single
frequency picture. Three modes are available:
bottom lock, bottom zoom and marker zoom.
The default mode is bottom lock. To change a
mode, see page 17.
Bottom lock display
The bottom lock display provides a normal pic-
ture on the right half of the screen and a 10-30
feet (default: 15 feet) wide layer in contact with
the bottom is expanded onto the left half of the
screen. This mode is useful for detecting bottom
fish.
B/L-LF
G:AF R:A
5
Fish
4
school
3
2
Zoomed
1
fish
21.7
m
0
Bottom lock display
Note1: To adjust the range of the zoom display,
go to the Range menu (see page 20).
Note2: To turn on or off the Zoom Marker, go to
the Display menu (see page 18).
3
1. OPERATION
50/200 1/1
0
0.0
200 kHz
picture
20
40
60
80
Resolu- Detectable Bottom
tion range tail
Low Deep Long
High Shallow Short
1/1
0 0
Bottom lock
display
Zoom marker
10
This section
20
is zoomed.
Single
frequency
30
display
Bottom
displayed flat
40