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ACS-5059 Rev. - 5 - 02/2000
ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Collision Avoidance System User’s Manu a l
TCASII/ACASII
The info rmation contained in this manual is for re fe rence use only.
If any info rmation contained herein conflicts with similar info rm ation
contained in the Airplane Flight Manu a l , the info rmation in the
Airplane Flight Manual shall take pre c e d e n c e .
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
Table of Contents
Section 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Section 2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Section 3 Controls & Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Section 4 System Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Section 5 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
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ACS-5059 • Rev 5 - 02/2000
Collision Avoidance System User’s Manu a l
SECTION 1
Introduction
Scope This manual applies to systems which are compliant to
RTCA DO185A MOPS Change 7.0 and RTCA “DO-
185” MOPS Change 6.04a. These systems are re f e r re d
to as TCAS II (Traffic Alert and Collision Avo i d a n c e
System) in the United States and ACAS II (Airborn e
Collision Avoidance System) intern a t i o n a l l y. The term inology
is used interchangeably and, for the purpose of
discussion, TCAS II will be the terminology used in this
manual.
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 altitude,the
relative altitude of the intruder. Should the TCAS II
processor 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 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 illuminating
red and green areas 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 altitude 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.
WHAT
IS THE
TCAS II
SYSTEM?
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 User’s Manual.
ATC procedures and the “see and avoid concept”will
continue to be the primary means of ensuring aircraft
separation.However, if communication is lost with
ATC,TCAS II adds a significant backup for collision
avoidance.
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Collision Avoidance System User’s Manu a l
SECTION 2
Operation
TCAS II Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
TCAS II Traffic Display Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Off Scale Traffic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
The RA/VSI Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
The TA/VSI Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
HowTo FlyTypical TCAS II Commands – Change 6.04a . . . . . . . . . . . . . . . . .15
HowTo Fly Typical TCAS II Commands – Change 7.0 . . . . . . . . . . . . . . . . . .24
Audio Announcements – Change 6.04a . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
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