9-24
GTN 625/635/650 Pilot’s Guide
190-01004-03 Rev. P
Foreword
Getting
Started
Audio &
Xpdr Ctrl
Com/Nav
FPL
Direct-To
Proc
Wpt Info
Map
Traffic
Terrain
Weather
Nearest
Services/
Music
Utilities
System
Messages
Symbols
Appendix
Index
9.6 RYAN TCAD 9900BX with the GDL 88
NOTE: When a TCAD is connected to a GTX 345, the available controls
will appear as described for TCAS in "ADS-B Traffic Menu"
Ryan TCAD is a system that provides audio and visual alerts for traffic near
your aircraft. The information from this system can be interfaced through the
GTN series. Operating instructions and details on the modes of operation are
described in the Ryan TCAD operator’s handbooks.
• TCAS-like symbols are used in the 9900BX.
• Altitude modes are available (normal, look up, look down, unrestricted).
• Ranges are manually controlled for the current shield.
• Traffic display range selections:
- Ryan 9900BX — 1 NM, 2 NM, 2 and 6 NM, 6 and
12 NM, and 12 and 24 NM.
9.6.1 Ryan TCAD Description
NOTE: Refer to the Ryan TCAD Pilot’s Guide for a detailed description of
the Ryan TCAD System.
The Ryan TCAD (Traffic and Collision Alert Device) is an on-board air traffic
display used to identify potential collision threats. TCAD computes relative altitude
and range of threats from nearby Mode C and Mode S-equipped aircraft. TCAD
will not detect aircraft without operating transponders or those that are beyond
radar coverage. TCAD, within defined limits, creates a “shield” of airspace around
the aircraft that detected traffic cannot penetrate without triggering an alert.
TA: Traffic Advisory. This is traffic with 500 feet, or less, of altitude separation
that is converging or maintaining altitude separation.
PA: Proximity Advisory. This is traffic with 500 feet of altitude separation that
is not a TA.
TRFC: Other traffic.
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