BendixKing CAS 67A TCAS II - Manual (Page 6)

006-08499-0000 Rev 5 Effective Date 4/99 4
INTRODUCTION
TCAS II is a system used for detecting and tracking aircraft in the
vicinity of your own aircraft. By interrogating their transponders it
analyzes the replies to determine range, bearing, and if reporting alti-
tude, the relative altitude of the intruder. Should the TCAS II proces-
sor determine that a possible collision hazard exists, it issues visual
and audio advisories to the crew for appropriate vertical avoidance
maneuvers.
TCAS is unable to detect any intruding aircraft without an operating
ATCRBS transponder (operating in Mode A and C) or a Mode S
transponder.
There are two types of cockpit displays for TCAS II, the Resolution
Advisory (RA) display and the Traffic Advisory (TA) display. The RA
display is incorporated into the vertical speed indicator (VSI). By illu-
minating red and green arcs around the dial it displays the required
rate, or limitation of climb or descent, to avoid a possible collision.
The TA display shows the intruding aircraft’s relative position and alti-
tude with a trend arrow to indicate if it is climbing or descending at
greater than 500 feet per minute. This TA display may be provided on
the weather radar indicator, on a dedicated TCAS display or a TA/VSI
display.
The TA display identifies the relative threat of each intruder by using
various symbols and colors. Complementing the displays, TCAS II
provides appropriate synthesized voice announcements. A complete
list of symbols and announcements is given in the Operation section
of this Operator’s Manual.
ATC procedures and the “see and avoid concept” will continue to be
the primary means of ensuring aircraft separation. However, if com-
munication is lost with ATC, TCAS II adds a significant backup for
collision avoidance.
Introduction