SECTION
2
OPERATION
1
the operation level of the mode you select. In the case of AT1,
set a range of 1.5 NM or more.
key continuously
to display the
SETUP MENU.
2.3
Auto/Manual Modes
The AUTO key switches the auto and manual modes.
I
1.5
HU
2.3.1 Auto Mode
The
GAIN adjustment, sea clutter suppression (STC), and frequency tuning are automatically per-
formed.The GAIN and rain and snow clutter suppression (FTC) can
be
adjusted manually even
when the
AUTO function is used. If you want to make very fine adjustments, use these keys during
the
AUTO mode. Adjustment can also be made manually using the STC key.
The
AUTO mode is divided into AT1 and AT2 submodes. AT1 and AT2 are switched each time the
AUTO key is pressed. To return to the manual mode press the STC key.
Select the one to use according to the situation as described below.
AT1
Use
this mode when confirming the course in areas where strong radar echoes are returned such
as: when leaving or entering port, or when navigating in bays and narrow channels, or near small
islands. The effect is the similar to reducing the STC manually and setting relatively-low GAIN.
AT2
Use this mode when navigating in areas where there are no objects
returning
very strong radar echoes
such as in the open
sea, sea clutter is also suppressed automatically. The effect is similar to
control-
ling
sea clutter manually using the STC key and setting high GAIN.
The constants (image observation degree) for the AT1 and AT2 operation levels can be changed if
necessary using the
following
procedure.
8
Press AUTO key to select either AT! or AT@ to change
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