User-Initiated Test; Voice Announcements; Switching Between Standby And Operating Modes - Garmin GNC 420W Pilot's Manual Addendum

To begin tracking intruder aircraft
1. Turn the cursor on and highlight STBY.
Turn the small right knob to select OPER.
2.
Press ENT to confirm operating mode and
3.
begin tracking intruder aircraft.
Operating Mode is confirmed by the display
of "OPER" in the upper right-hand corner of
the Traffic Page.
NOTE: The FAILED message occurs when the system
detects an error and prohibits further traffic display
operation as long as this message stays on the screen.

User-initiated Test

NOTE: A user-initiated test can only be performed
when in standby or failed mode.
In addition to the power-up test, the SKYWATCH
performs a continuous self-test. This continuous self-
test is performed several times per minute. A user-
initiated test of the SKYWATCH interface can also be
performed.
To perform a user-initiated test:
Turn the small right knob to select the Traffic
1.
Page.
2. From the Traffic Page, press MENU to display
the Page Menu.
Turn the small right knob to select "Self
3.
Test?" and press ENT.

Voice Announcements

See the SKYWATCH Pilot' s Guide for information
on voice announcements.

Switching Between Standby and Operating Modes

The unit must be in operating mode for traffic
to be displayed. The ability to switch out of standby
into operating mode on the ground is especially useful
for scanning the airspace around the airport before
takeoff.
To switch into Operating Mode from
Standby Mode:
1. Press in on the cursor knob and highlight
"STBY". Turn the small right knob to select
"OPER?".
Press ENT to confirm and place the SKYWATCH
2.
in operating mode.
NOTE: The SKYWATCH switches out of standby into the
6-NM display range. If your aircraft has a squat switch
and you do not manually switch out of standby, the
SKYWATCH will automatically switch out of standby 8
to 10 seconds after takeoff.
To switch into Standby Mode from the Traf-
fic Page:
Turn the cursor on and highlight "OPER".
1.
2. Turn the small right knob to select
"STBY?".
Press ENT to confirm and place the SKYWATCH
3.
in standby mode.
NOTE: If your aircraft has a squat switch, STBY is
not displayed while you are airborne but will go into
standby 24 seconds after landing. This delay allows the
SKYWATCH to remain in the operating mode during a
touch-and-go maneuver.
Section 3
Skywatch Interface
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