Northstar
FISH 457/467
Installation and Operation Manual
27
4-4 Sonar 50/200 display
The window shows:
A the 50 kHz sonar history on the left
B the 200 kHz sonar history on the right.
Gain can be set independently for each
frequency (see section 3-6). Range applies to
both frequencies (see section 3-5).
A
B
4-3 Sonar Bottom display
The window shows the sonar history on the right
and the bottom signal as a flat trace in the center
of the zoom section on the left. The flat trace
makes it easy to compare the echo strengths
shown in the bottom signals. This can help to
identify the type of bottom and objects close to
the bottom.
The zoom bar on the far right shows the area of
the history that is magnified in the zoom section:
• Use
the or
keys to adjust the zoom
range.
•
The 457/467 calculates the zoom depth
automatically.
It is not necessary to turn Bottom lock on for this
display.
A Zoomed bottom signal
B Sonar
history
A
B
