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Collision Avoidance System User’s Manu a l
IVA-81A/IVA-81D
TA/VSI
Traffic
Advisory/
Vertical
Speed
Indicator
Vertical Speed
Pointer
Resolution
Advisory
“Fly-Away-
From”
Command Arc
(Red)
Intruders
Own
Aircraft
Symbol
Maximum
Range
Border
Resolution
Advisory
“Fly-To”
Command Arc
(Green)
TA Select
Pushbutton–
Traffic Select
or Switchable
as wired
during
installation
Range Pushbuttons -
The following are range selection
possibilities and are configured
during installation:
• 3, 5, 10 and 15 NM
• 3, 5, 10, 20 and 40 NM
• 5, 10, 20 and 40 NM
• 3, 5, 10, 20 and 40 NM
Not all unit versions support
all listed range selections.
Off Scale
Traffic
2 Mile
Range
Ring
Brightness
Control
The TA/VSI combines the vertical speed instrument
with the TA and RA display functions.Red and green
bands around the circumference of the screen give
RA information.Traffic location is presented on the
face of the display inside of the vertical speed scale.
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Collision Avoidance System User’s Manu a l
Configured
for
Switchable
Configured
for TA
Select
Versions of the IVA-81A/IVA-81D which have a TA
Select pushbutton (TA SEL) on the bezel can be configured
to operate in either the TRAFFIC SELECT
mode or the SWITCHABLE mode.The following are
descriptions of each mode of operation:
When no TA or RA traf fic is present,the IVA-81A/IVA-
81D operates in the Vertical Speed Indicator mode
only, with no TCAS Traffic Display overlay. Pressing TA
Select will have no effect when no TA or RA traffic is
in the area.When a TA or RA intruder is detected,the
unit automatically changes to the Traffic Display
mode with a Vertical Speed Indicator overlay.With an
intruder present,pressing TA Select will revert the
display back to VSI mode only. The unit automatically
reverts back to the Vertical Speed Indicator mode
when threat traffic is no longer present.The presence
of a newTA or RA intruder will initiate a repeat of
this cycle of operation.
The IVA-81A/IVA-81D operates in either the Traffic
Display mode or the Vertical Speed indicator mode,
regardless of whether there is threat traf fic present.
The display formats are selected manually by pressing
TA Select.When a TA or RA intruder is detected,
and if the display format has not been previously
manually selected,the unit automatically changes to
the Traffic Display mode with a Vertical Speed
Indicator overlay.Again,pressing TA Select will alternate
between the two formats.The unit will not automatically
revert back to the Vertical Speed only mode
when threat traffic is no longer present.The presence
of a newTA or RA intruder will initiate a repeat of
this cycle of operation if the display format was
Vertical Speed only format.
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Collision Avoidance System User’s Manu a l
Display
Message
Locations
(Blue) TCAS system in standby
(Blank)
(Yellow)
(Blue/Yellow - when active TA)
(Yellow) TCAS system failure
TCAS STBY (Blue)
TA/RA (Blank)
TEST (Yellow)
TA ONLY (Blue)
TCAS (Yellow)
NO TCAS
TA/RA
TEST
TA ONLY
NO TCAS
TCAS Mode/Failure
Standard Optional
Display Message Locations
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Collision Avoidance System User’s Manu a l
Typical
TA/VSI
Scenarios
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Collision Avoidance System User’s Manu a l
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Collision Avoidance System User’s Manu a l
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Collision Avoidance System User’s Manu a l
SECTION 4
System Considerations
Warnings and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
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Collision Avoidance System User’s Manu a l
Warnings and Limitations specific to Change 7.0 or
Change 6.04a are identified as such.The capability of
TCAS II is dependent upon the type of transponder
　
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