Garmin GPSMAP 500 Series Pilot's Manual Addendum - Page 19

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Garmin GPSMAP 500 Series Pilot's Manual Addendum
All information in this section pertaining to the display and control of the Ryan 9900B TCAD also
applies to the Ryan 9900BX TCAD except for the following:
• TCAS-like symbology is used in the 9900BX as opposed to the 9900B (similar to SKYWATCH).
• Altitude modes are available similar to SKYWATCH (normal, look up, look down, unrestricted).
• Ranges are manually controlled instead of being automatically re-sized to the current shield.
• Traffi c display range selections are different:
• Ryan 9900B— range is slaved to current shield size.
• Ryan 9900BX— 2 nm, 2 and 6 nm, 6 and 12 nm, 12 and 24 nm.

Ryan TCAD Description

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 and those that
are beyond radar coverage. TCAD, within defined limits, creates a shield of airspace around the aircraft,
whereby detected traffic cannot penetrate without triggering an alert.
SECTION 4
RYAN TCAD INTERFACE
Section 4
Ryan TCAD Interface
See the Ryan TCAD Pilot's Handbook for a
description of the traffi c symbols.
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