2
information are displayed in the lower
when needed.
All displays are limited
portion of the screen
to sixteen targets. The
display mode, above/normal/below, is annunciated in the upper
right corner of the display.
J. (2) (b) Navigation Display (Figure 253.2) - The ND is the only range
selectable display for
TCAS.
TCAS information is overlayed
onto the normal map display information.
Only
targets within
the selected range are displayed and off-scale targets are not
used.
This display does not use a two-mile range ring and no
bearing targets are not displayed on this page. This display
is selected for on-side display through the pilot and copilot
DC-884 Display Controllers.
Symbols used are identical to
those used on the system page. Targets are subject to the
A/N/B selection annunciated on the
TCAS system page.
(c)
Primary F1ight Display (Figure 253.3) - The PFD is used for
resolution advisory guidance information, as
well as displaying
the current TCAS operational mode. The vertical speed scale is
expanded to t6000 fpm.
Recommended performance is presented on
the left edge of the vertical speed tape with acceptable and
unacceptable vertical speeds shown in green and red
respectively.
The vertical speed indicator digits are colored
to correspond with the color band for the vertical
speed they
occupy; so that if TCAS is displaying a red guarded band from
-6000 fpm to -500 fpm, and a green target band from -500 fpm to
O fpm, the vertical
speed indicator digits are red from -6000
to -500, green from -500 to O, and white above O to +6000. The
TCAS mode is displayed on the PFD, beside the vertical speed
tape opposite the O fpm mark.
TCAS
modes are STBY, TEST, TA
and TA/RA.
(3) TCAS Traffic
Display Symbology (see Figure 253.1)
(a) Above/Normal/Below (ANB) - This selection is available on the
. .
TCAS adapter panel and is annunciated on the system page only.
The ANB function determines the targets to be displayed by
relative altitude from own aircraft.
The normal mode is not
annunciated and displays all altitude reporting traffic from
2700 ft below the aircraft to 2700 ft above. Above and
below
expand the normal display to 7000 ft relative in the chosen
direction, while retaining the 2700 ft selection in the other
direction.
Non-altitude reporting targets are always
displayed.
(b
Resolution Advisory (RA) Traffic Symbol - The RA traffic symbol
is a solid red square.
Targets not reporting altitude,
(transponder not on, or not transponder equipped) cannot
generate resolution advisories.
22-14-00
Page 298.36.2
Apr 15/93
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