Installation and Operation Manual
29
3-5 Sonar
The NF560 proposes a sonar function when the unit is connected to an optional depth
transducer.
To activate sonar function;
1 Press and hold
and select
System Configuration
icon
2 Select
Features
then
Sonar
.
3-5-1 Interpreting the display
①
Depth.
②
Single fish
:
Fish symbols with depth.
③
School of fish.
④
Depth line.
⑤
Bottom
:
Hard bottoms such as rock and
coral shown as wide bands.
Soft bottoms such as mud,
weed and sand show as narrow
bands.
⑥
Range of display.
⑦
Color bar.
The window scrolls from right (recent sonar
record) to left (old sonar record).
3-5-2 Mode
The unit operates in two different modes.
You can choose a mode depending on the
condition.
•
Auto mode:
This is the most commonly
used option. In this mode, settings are
automatically adjusted for the best display
of fish and bottom according to
environment.
•
Manual mode:
Use this option for manual
setting. The option might bring you best
result for your purpose.
To change a mode;
1 Press
then select
Gain
.
2 Select
Mode
then
Manual
or
Auto
and
press
.
3 Press
to exit until returning to the
Chart
window.
①
②
③
⑤
⑥
④
⑦
Installation and Operation Manual
30
3-5-3 Single and Dual frequency fish finding
Sonar frequencies
The unit has dual frequency, 200kHz and
50kHz to detect various bottom conditions.
To select the sonar frequency in sonar
window:
1 Press
, select
Frequency
.
2 Select
frequency
and press
.
3 Press
to exit.
High frequency (200kHz )
The higher ultrasonic signal, the better is the
resolution. For this reason the 200 kHz
frequency is ideal for detailed observation of
fish schools.
Low frequency (50kHz)
The lower frequency signal is, the wider is
the detection area. Therefore, the 50kHz
frequency is useful for general detection and
judging bottom condition.
Mixed frequencies (200kHz / 50kHz)
The Mixed frequency combines the 200 kHz
and the 50 kHz in the Sonar window. The
50kHz picture appears on the left and the
200kHz picture on the right.
The display is useful for comparing the same
picture with two different frequencies.
①
High Frequency (200 kHz)
②
Low Frequency (50 kHz)
3-5-4 Range
Range is the depth of water displayed on the
sonar window. The basic range may be
chosen in Auto or manual mode.
Auto:
When the mode is set to
Auto
, the
unit adjusts the depth automatically for the
best performance. This option is
recommended for normal operation.
Manual:
When the mode is set to
Manual
,
the unit only displays the depth of water at a
given range. That means the sea bottom
might not be displayed in the sonar window
or it might display half of display in white
because range is more important than sea
bottom depth. As shown in below images.
To set the manual mode in the sonar
window:
1 Press
, select
Range
.
2 Select a mode you want and press
.
3 If you select the manual mode, press
or
to change value of max
displayed depth.
①
②