User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
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CAS/Part No.9005000
(c) Data Tags
A data tag, made up of a two-digit number, a plus (+) or a minus (-) sign,
and may also include an arrow, appears either above or below the
intruder aircraft symbol. The data tag appears in the same color as the
advisory.
1 Two-Digit Number (Relative Altitude)
Represents the relative altitude difference, in hundreds of feet, either
above or below the TCAS aircraft of an intruder aircraft. For an
intruder above the TCAS aircraft, the data tag is placed above the
traffic symbol and preceded by a plus (+) sign; for one below, the tag
is placed below the traffic symbol and be preceded by a minus (-)
sign.
2 Plus (+) or Minus (−) Sign
Appears adjacent to the relative altitude number and indicates
whether the displayed aircraft is above (plus) or below (minus) the
TCAS aircraft.
3 Arrow
A vertical arrow is placed to the immediate right of the traffic symbol
if the intruder is either climbing (up arrow) or descending (down
arrow) in excess of 500 feet per minute (152.4 meters per minute).
(d) VSI Scale Overlays
During a resolution advisory, red and green bands overlay the VSI scale.
The red band indicates what vertical speed range is to be avoided by the
pilot (prohibited vertical speed). The green band indicates the vertical
speed the pilot is to attain to achieve safe separation from a threat
aircraft (recommended vertical speed). The red/green band reflects the
RA in progress and acts as a vertical speed advisory for the pilot.
(e) Reference Graphic and Annunciations
A white airplane symbol is displayed in the lower center of the VSI which
represents the aircraft’s own position. A white range ring made up of 12
white hash marks, each corresponding to a normal clock position, is
included. The range ring surrounds the airplane with a radius of 2
nautical miles and is intended to assist in interpreting TCAS traffic
information.
The scale of the VSI display is 6.0 nautical miles to the top display edge
of the VSI (ahead of the aircraft), 4 nautical miles to the left and right
edges, and 2.5 nautical miles to the bottom (behind the aircraft).
Annunciations in white letters serve as a reminder of the current
operation mode. They include TCAS OFF, TA only and RA only. Fault
annunciations in amber letters replace the mode annunciations in case of
system failure. They include TCAS FAIL, RA FAIL, VSI FAIL, and TA
FAIL (traffic display failure). Figure 1-13 shows a typical failure display.
Pub. No. 8600200-001, Revision 004
34-45-29
1-81
04 Nov 2014
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