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

To begin tracking intruder aircraft
1. Turn the cursor on and highlight STBY.
2. Turn the small right knob to select OPER.
3. Press ENT to confi rm operating mode and begin tracking intruder aircraft.
The FAILED message occurs when the system detects an error that prohibits further traffi c
display operation as long as this message stays on the screen.

User-initiated Test

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:
1. Turn the small right knob to select the Traffi c Page.
2. From the Traffi c Page, press MENU to display the Page Menu.
3. Turn the small right knob to select 'Self 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 traffi c 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.
Getting Started Section 3
SKYWATCH Interface Main Page Sequence
Operating Mode is confi rmed by the display of
'OPER' in the upper right-hand corner of the
Traffi c Page.
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