曝光台 注意防骗
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This intruder is now 1000 feet below your aircraft
and climbing.
Traffic
Advisory (TA)
A symbol change to a filled yellow circle indicates
that the intruding aircraft is considered to be potentially
hazardous.Depending on your altitude TCAS II
will display a TA when the time to CPA is between 20
and 48 seconds.
Here the intruder is 900 feet below your aircraft,
climbing at 500 feet per minute or greater.A voice
announcement is heard in the cockpit,advising,
“Traffic, Traffic”
Under normal conditions a TA will precede an RA by
10 to 15 seconds. The crew should attempt to gain
visual contact with the intruder and be prepared to
maneuver should an RA be sounded 10 to 15 seconds
later. The crew should take no evasive actions based
solely on the TCAS II display.
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A solid red square indicates that the intruding aircraft
is projected to be a collision threat.TCAS II calculates
that the intruder has reached the point where a
Resolution Advisory is necessary.The time to closest
approach with the intruder is now between 15 and
35 seconds depending on your altitude.the symbol
appears together with an appropriate audio warning
and a vertical maneuver indication on the RA/VSI.
Voice announcements are listed later in this section.
This aircraft is now 600 feet below your altitude and
still climbing.A synthesized voice announces a vertical
maneuver command,such as,
“Climb, Climb, Climb.”
(Change 6.04a)
or
“Climb, Climb.”
(Change 7.0)
The pilot should smoothly but firmly initiate any
required vertical maneuver within 5 seconds from the
time the RA is posted, using pitch cues or the Vertical
Speed Indicator as appropriate.
An intruder must be reporting altitude in order to gen-
Resolution
Advisory
(RA)
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Off Scale
Traffic
erate an RA. Therefore, the RA symbol will always have
an altitude tag.
The presence of TA or RA aircraft that are beyond the
selected display range is indicated by one half of the
traffic symbol at the edge of the screen.The position
of the half-symbol represents the bearing of the
intruder.
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TA AND RA TRAFFIC
OFF SCALE, TCAS
MODE FORMAT.
SAME TRAFFIC ON
10 MILE RANGE,
WEATHER MODE
FORMAT.
TCAS II guidance is incorporated into the vertical
speed indicator.Two rows of colored lights,one green
and one red,are located around the vertical speed
scale.TCAS II uses the lights to indicate whether to
climb,descend or remain level.The lights are OFF
unless an active Resolution Advisory is in progress.
Resolution Advisories are grouped as Corrective
Advisories or Preventive Advisories.Corrective
Advisories require a positive action by the crew
accompanied by a green arc on the RA/VSI showing
“Fly To”guidance. Preventive Advisories require that
NO action be taken to alter the flight path of the aircraft.
When TCAS issues an RA,certain segments in the row
of red lights will be turned on.Segments in the row
of green lights will be on when the pilot is required
to actively maneuver the aircraft to satisfy the resolution
advisory. For safe separation from the intruder,
the pilot should maneuver the aircraft within the vertical
speeds represented by the green lights.Vertical
speeds within the red area must be avoided.
An RA may be presented on the VSI requiring avoidance
of two or more threat aircraft simultaneously.
For example a “do not descend”indication may be visible
at the same time a “limit climb rate”indication
appears because of threat aircraft above and below
your own aircraft.
The RA/VSI
Instrument
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The TA/VSI
Instrument
The TA/VSI combines the plan position of intruding
aircraft and TCAS II guidance on the vertical speed
instrument.
A pointer and circular vertical speed scale indicate
aircraft vertical rate.Resolution Advisories are shown
as red and green bands outside of the scale.The center
of the display presents intruding traffic.Refer to
Section 3 for a detailed description of the TA/VSI.
The Resolution Advisory is incorporated into the
Vertical Speed Indicator. By illuminating red and
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TCASII/ACASII Collision Avoidance System User’s Manual(3)
