Garmin GPS 500 - Manual (Page 192)

GPS 500 Pilot’s Guide and Reference 12-4
SECTION 12
ADDITIONAL FEATURES
TIS Audio Alerting
The TIS audio alert is generated when the number of
Traffic Advisories (TA) on the 500 Series 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 500 Series unit according
to TCAS symbology on a dedicated Traffic page, and on
the moving Map Page. The symbology is shown in Table
12-1, and Figures 12-2, 12-3, and 12-4. The symbology
is described in Table 12-2. 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). Other Traffic is displayed as hollow white
(may be configured as cyan) diamonds.
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
Other Traffic
Table 12-1 TIS Symbology
Figure 12-2 Traffic Page
‘Own’ (Client)
Aircraft Symbol
‘Other’ (Intruder)
Traffic Symbol
Traffic Advisory
(TA) Symbol
Traffic Ground
Track Vector
Figure 12-3 Out-of Range TA Symbol
Out-of-Range
Traffic Advisory
(TA) Symbol
190-00181-60 Rev. G