Garmin Cirrus Perspective SR20, Pilot'S Manual

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Cirrus Perspective
™
by Garmin – Pilot’s Guide for the SR20/SR22SR22T 190-00820-08 Rev. A
402
HAZARD AVOIDANCE
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL FEA
TURES
APPENDICES
INDEX
6.9 GARMIN GTS 800 TRAFFIC
WARNING:
The GTS 800 Traffic Advisory System (TAS) is intended for advisory use only to aid the pilot in
visually acquiring traffic. No avoidance maneuvers should be based solely upon TAS traffic information. It
is the responsibility of the pilot in command to see and maneuver to avoid traffic.
NOTE:
Pilots should be aware of TAS system limitations. TAS systems require transponders of other aircraft
to respond to system interrogations. If the transponders do not respond to interrogations due to phenomena
such as antenna shading or marginal transponder performance, traffic may be displayed intermittently, or
not at all. Aircraft without altitude reporting capability are shown without altitude separation data or climb
descent indication. Pilots should remain vigilant for traffic at all times.
NOTE:
Aircraft without operating transponders are invisible to TAS.
The optional Garmin GTS 800 is a Traffic Advisory System (TAS). The system enhances flight crew situational
awareness by displaying traffic information for detected transponder-equipped aircraft. The system also provides
visual and aural traffic alerts including voice announcements to assist the pilot in visually acquiring traffic.
The GTS 800 is capable of tracking a total of 45 intruding aircraft equipped with Mode A, C, or S transponders.
The Perspective
™
can display a maximum of 30 aircraft with the highest threat potential simultaneously.
THEORY OF OPERATION
When the system is in Operating Mode, the TAS unit interrogates the transponders of intruding aircraft while
monitoring transponder replies. The system uses this information to derive the distance, relative bearing, and
if reported, the altitude and vertical trend for each aircraft within its surveillance range.
The system then calculates a closure rate to each intruder based on the projected Closest Point of Approach
(CPA). If the closure rate meets the threat criteria for a Traffic Advisory (TA), visual and aural alerting is
provided.
TAS SURVEILLANCE VOLUME AND SYMBOLOGY
The GTS 800 TAS monitors the airspace within ±10,000 feet of own altitude, and up to 12 nm in the
forward direction. TAS range is somewhat reduced to the sides and aft of own aircraft due to the directional
interrogation signal patterns. The system displays TAS-detected traffic using the symbology shown in Table
6-23.
In addition, if a 1090 MHz extended squitter transponder is installed, and the GTS 800 detects airborne
traffic providing 1090 MHz Automatic Dependent Surveillance - Broadcast (ADS-B) information, the system
will display the TAS traffic using the ADS-B symbology shown in Table 6-24.
NOTE:
Do not confuse this functionality with full ADS-B capability, which can provide traffic information
from ADS-B Ground-Based Transceivers (GBTs) and ADS-B traffic outside of the TAS surveillance volume.
This system is limited to displaying ADS-B information from suitably equipped airborne aircraft within the
TAS surveillance volume.