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Part One: Section 1

TIS Operation and Symbology

The TIS audio alert is generated from the

GTX 330 whenever the number of Traffic Ad-

visories on the 400W/500W display increases

from one scan to the next. Limiting Traffic

Advisories only reduces the "nuisance" alerting

due to proximate aircraft. For example, when

the first Traffic Advisories appears on the TIS

display, the user is alerted audibly. So long as

a single aircraft remains on the TIS display, no

further audio alert is generated. If a second (or

more) aircraft appears on the display, a new

audio alert is sounded.

If the number of Traffic Advisories on the TIS

display decreases and then increases, a new

audio alert is sounded. The TIS audio alert is

also generated whenever TIS service becomes

unavailable. The volume, pitch, and duration

of the audio alert (including the choice between

a male or female voice) is configured during

installation.

The following TIS audio alerts are available:

• "Traffic" —TIS traffic alert is received.

• "Traffic Not Available" — TIS service is not

available or out of range.

Traffic Advisory (TA)—This symbol is generated when traffic

meets the advisory criteria described in TIS Operational Proce-

Traffic Ground Track is indicated

on the 400W/500W display by a

"target track vector", a short line

displayed in 45-degree increments.

This vector shows the flight direc-

tion of the traffic.

190-00356-30 Rev C

dures.

"Other" Traffic—This symbol represents

traffic detected within the selected display

range that does not generate a TA.

Own Aircraft