Chapter 4 – Principles of Operation
SKY497 Pilot’s Guide
4-5
Audio Inhibit, GPWS, EGPWS, or TAWS
If your aircraft has a
G
round
P
roximity
W
arning
S
ystem
(
GPWS
),
E
nhanced
GPWS
(
EGPWS
), or
T
errain
A
wareness and
W
arning
S
ystem (
TAWS
) interfaced with the
SKY497
and an
alarm from one of those systems occurs, the
SKY497
senses the
alarm and delays the aural “traffic, traffic” component of any
TA
s issued until the alarm clears.
TA Symbol Duration
A
TA
symbol remains on the screen for at least
8
seconds, even
if the intruder aircraft no longer meets the
TA
criteria, as long
as the
SKY497
continues to track the aircraft.
Ground Intruder Filtering
Ground intruder filtering reduces the clutter of visual symbols
and aural announcements that would otherwise be generated
for intruder aircraft typically present on or near the ground
near airports.
For intruder aircraft determined to be below
380
ft
AGL,
ground intruder filtering prevents the display of all traffic
symbols (
TA
,
PA
, &
OT
) and suppresses the “
T
raffic,
T
raffic”
aural announcement. (See figure
4-1
.)
The
SKY497
uses ground intruder filtering only if your aircraft
has a radio altimeter connected to the
SKY497
and you’re
below
1,700
ft
AGL
.
Audio Inhibit
Summary of Contents for SKY497
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