GNS 530(A) Pilot’s Guide and Reference 190-00181-00 Rev. E
14-4
SECTION 14
ADDITIONAL FEATURES
TIS Audio Alerting
The TIS audio alert is generated when the number of
Traffic Advisories (TA) on the GNS 530 display increases
from one scan to the next. Limiting TAs only reduces
‘nuisance’ alerting due to proximate aircraft. For example,
when the first TAs appears on the TIS display, the user is
alerted audibly. As long as a single aircraft remains on
the TIS display, no further audio alert is generated. If a
second (or more) TAs appears on the display, a new audio
alert is sounded.
If the number of TAs on the TIS display decreases
and then increases, a new audio alert is sounded. A TIS
audio alert is also generated when 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.
TIS Symbology
TIS traffic is displayed on the GNS 530 unit according
to TCAS symbology, graphically displayed on a dedicated
page, and on the moving Map Page. The symbology is
shown in Table 14-1, Figures 14-2, 14-3, and 14-4. A
Traffic Advisory (TA) symbol appears as a solid yellow
circle (or half circle on the outer range ring if the traffic is
outside the range of the dedicated Traffic Page). All other
traffic is displayed as a solid (Proximity Advisory) or a
hollow (Other Traffic) white diamond.
Altitude deviation from own (client) aircraft altitude is
displayed (in hundreds of feet) for each target symbol. If
traffic is above own aircraft altitude the deviation is shown
above the target next to a ‘+’ symbol. If traffic is below
own aircraft altitude the deviation is shown below the
target next to a ‘-’ symbol.
Altitude trend is displayed as an up arrow (> +500
fpm), down arrow (< -500 fpm), or no symbol if less than
500 fpm rate in either direction.
The traffic ground track vector protrudes from each
symbol in the direction of travel.
Traffic Type Symbol
Traffic Advisory
Out-of-Range Traffic Advisory
Proximity Advisory
Other Traffic
Table 14-1 TIS Symbology
•
Traffic Advisory (TA) - This symbol (solid
yellow circle) is generated when a
n intruder
aircraft approaches on a course that projects
to intercept (defined by a 0.5 nm horizontal
radius and a relative altitude of ± 500 ft) the
pilot’s current course within 34 seconds.
•
Out-of-Range Traffic Advisory - This solid yellow
half circle appears under the same conditions and
has the same urgency as a TA. Its appearance
differs from the TA only to signify that the
intruder is outside of the current range of the
Traffic Page.
•
Proximity Advisory (PA) - This symbol (solid
white diamond) represents intruder aircraft that
are close in proximity, but do not appear to be on
a collision course.
•
Other Traffic Symbol - This symbol (hollow white
diamond) represents traffic detected within the
selected display range that does not meet the
criteria for a TA or PA.