User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
TCAS 3000 Traffic Alert and Collision Avoidance System
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Page 157
15 Dec 2005
(e) “ADJUST VERTICAL SPEED, ADJUST”: Reduce vertical speed to a speed out
of the illuminated red arc.
(f) “ADJUST VERTICAL SPEED, ADJUST”: Reduce climb or descent rate.
(g) “MAINTAIN VERTICAL SPEED, MAINTAIN”: Safe separation is based upon
maintaining the current vertical speed.
(h) “MAINTAIN VERTICAL SPEED, CROSSING, MAINTAIN”: Maintain vertical
speed while crossing the intruder’s flight path.
(i) “CLEAR OF CONFLICT”: Range is increasing, and separation is adequate;
return to assigned clearance.
(j) “CLIMB, CROSSING CLIMB—CLIMB, CROSSING CLIMB”: Safe separation is
best be achieved by climbing through intruder’s flight path.
(k) “DESCEND, CROSSING DESCEND, DESCEND, CROSSING DESCEND”: Safe
separation is best achieved by descending through the intruder’s flight path.
(4) Enhanced RA Messages
Enhanced RAs are annunciated on the TCAS computer unit using the voice
messages listed below as designated by the CAS data when the initial resolution
advisory does not provide sufficient vertical separation. These messages are
annunciated to convey a sense of urgency. The following messages can immediately
follow a message from the previous paragraph and have a reversal of sense.
NOTE: These advisories are expected to occur only on rare occasions, usually
when an intruder suddenly changes its current flightpath. (Maneuvering
intruder)
(a) “INCREASE CLIMB, INCREASE CLIMB”: (Received after a “CLIMB” advisory)
Indicates additional climb rate required to achieve safe vertical separation from a
maneuvering intruder.
(b) “INCREASE DESCENT, INCREASE DESCENT”: (Repeated two times, received
after “DESCEND” advisory) Indicates additional descent rate required to achieve
safe vertical separation from a maneuvering intruder.
(c) “CLIMB, CLIMB NOW!—CLIMB,CLIMB NOW!”: (Received after a “DESCEND”
resolution advisory) Indicates a reversal in sense is required to achieve safe
vertical separation from a maneuvering intruder.
(d) “DESCEND, DESCEND NOW!—DESCEND, DESCEND NOW!”: (Received after
a “CLIMB” resolution advisory) Indicates a reversal in sense is required to
achieve safe vertical separation from a maneuvering intruder.
D. Operating Procedures
Basic TCAS operating procedures on the ground include preflight test, TCAS activation
before takeoff, and TCAS deactivation after landing. Inflight procedures are contained in
the pilot’s manual.