Com/Nav - Garmin GTN 625 Pilot's Manual

9.4
Foreword
NOTE: TIS and Traffic Advisory System (TAS) may not both be configured
Getting
at the same time.
Started
Audio &
TAS data comes from a TAS unit such as a Garmin GTS 800 or 820, Skywatch
Xpdr Ctrl
497, KTA 810, or other unit.

Com/Nav

Refer to the appropriate Traffic Advisory System' s Pilot' s Guides for a detailed
discussion of the respective traffic advisory system.
FPL
The type of traffic systems that is installed is described by the Traffic Page
keys. If a Traffic Advisory System (TAS) is configured, a TRF Status and ALT
Direct-To
Filter key will be displayed.
Proc
NOTE: Pilots should be aware of TAS system limitations. TAS systems
require transponders of other aircraft to respond to system interrogations.
Wpt Info
If the transponders do not respond to interrogations due to phenomena
such as antenna shading or marginal transponder performance, traffic may
Map
be displayed intermittently, or not at all. Aircraft without altitude reporting
capability are shown without altitude separation data or climb descent
Traffic
indication. Pilots should remain vigilant for traffic at all times.
Terrain
WARNING: The Traffic Advisory System (TAS) is intended for advisory use
only to aid the pilot in visually acquiring traffic. No avoidance maneuvers
Weather
should be based solely upon TAS traffic information. It is the responsibility
of the pilot in command to see and maneuver to avoid traffic.
Nearest
A Traffic Advisory System (TAS) enhances flight crew situational awareness
Services/
by displaying traffic information for transponder-equipped aircraft. The TAS
Music
also provides visual and aural traffic alerts including voice announcements to
Utilities
assist in visually acquiring traffic.
When the TAS is in Operating Mode, the unit interrogates the transponders
System
of intruding aircraft while monitoring transponder replies. The TAS uses this
information to derive the distance, relative bearing, and if reported, the altitude
Messages
and vertical trend for each aircraft within its surveillance range. The TAS then
calculates a closure rate to each intruder based on the projected Closest Point of
Symbols
Approach (CPA). If the closure rate meets the threat criteria for a Traffic Advisory
Appendix
(TA), visual and aural alerting is provided.
Index
9-12
TAS Traffic (Optional)
Garmin GTN 625/635/650 Pilot's Guide 190-01004-03 Rev. K