User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

CAS/Part No.9005000

● Non-threat Traffic, indicates other targets within the range of the display

whose relative altitude is greater than ±1200 feet (365.76 meters) vertically

or a distance greater than six nautical miles from own aircraft.

● Proximity Traffic, indicates the target is within ±1200 feet (365.76 meters)

vertically or within six nautical miles of own aircraft.

The two levels of advisories include:

● Traffic advisories (TA) indicate the range, bearing, and relative altitude of the

intruder to aid in visual acquisition of the intruder.

● Resolution advisories (RA) indicate a vertical maneuver to be performed or

avoided in order to assure safe separation.

Traffic advisories can be displayed on a Vertical Speed Indicator/Traffic and

Resolution Advisory (VSI/TRA) display, Electronic Flight Instrument System

(EFIS) or any instrument that displays the appropriate symbology and conforms

to the definition of ARINC Characteristic 735b.

Resolution advisories can be displayed on the VSI/TRA display, EFIS or any

other indicator that displays the appropriate symbology and conforms to the

definition of ARINC Characteristic 735b.

Figure 1-1 shows the various types of intruder equipment and the resulting

advisories. It should be noted that Mode A equipped intruders result in detection

and display of TAs only. An intruder not equipped with a transponder is invisible

to TCAS.

Communication with another TCAS-equipped aircraft is provided by the

embedded diversity Mode S transponder or an external onboard diversity Mode

S transponder. Only one onboard Mode S transponder is required for T

CAS

operation. However, the ACSS T

CAS operates with either of two onboard Mode

S transponders, one of which operates as a spare. The transponder in use is

selectable from the Flight Deck. Figure 1-2 shows the communication between

two TCAS equipped aircraft. Configuration A shows communication between a

CAS with the embedded transponder and another aircraft. Configuration B

shows communication between a T

CAS with an external transponder and

another aircraft.

Pub. No. 8600200-001, Revision 004

34-45-29

1-27

04 Nov 2014

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