Garmin GTS 855 - Manual (Page 13)

9 190-00587-02 Rev. A Garmin GTS 8XX Series Traffic Advisory System
TAS/TCAS Symbology
The GTS 8XX Series supports displays that depict intruding traffic using the
symbols shown in the following table. Refer to the documentation for the specific
display to confirm the supported symbology. Symbol colors may vary depending
on the display product.
TAS Symbol Description
Non-Threat Traffic
(intruder is beyond 6 NM and greater than 1200 feet vertical
separation)
Proximity Advisory (PA)
(intruder is within 6 NM and less than 1200 feet vertical separation)
Traffic Advisory (TA)
(closing rate, distance, and vertical separation meet TA criteria)
Traffic Advisory Off Scale
Table 4 TAS Intruder Symbol Description
A Traffic Advisory (TA), displayed as a yellow circle, alerts the crew to a
potentially hazardous intruding aircraft if the closing rate, distance, and vertical
separation meet TA criteria. A Traffic Advisory that is beyond the selected display
range is indicated by a half TA symbol at the edge of the screen at the relative
bearing of the intruder.
A Proximity Advisory (PA), displayed as a solid white diamond, indicates the
intruding aircraft is within ±1200 feet and is within a 6 NM range, but is still not
considered a TA threat.
A non-threat symbol, shown as an open white diamond, is displayed for all
other traffic beyond 6 NM that does not meet the criteria to be a TA or PA.
Relative altitude, when available, is displayed above or below the corresponding
intruder symbol in hundreds of feet. When this altitude is above own aircraft,
it is preceded by a “+” symbol; a minus sign “-” indicates traffic is below own
aircraft.
A vertical trend arrow to the right of the intruder symbol indicates climbing or
descending traffic with an upward or downward-pointing arrow respectively.