2. c. (1) (o) Vertical Navigation Scale - The vertical navigation scale
appears to the right of the attitude sphere.
Glideslo~;e(G)
and VNAV (V) deviations are displayed on this scale.
source selection for this scale is done through the display
controller.
The selected source type is labeled with the
letters shown in parenthesis of the above listed source types.
The VNAV scale is enabled for display only when a
VNAV flight
director mode is active (see Figure 208).
The vertical
navigation scale has a fixed white (G)/cyan (V) deviation scale
showing t2 dots of deviation.
The green (G)/cyan (V) deviation
pointer moves along this scale to show deviation from path
center.
Aircraft displacement from path is indicated by the
relationship of the aircraft to the deviation pointer.
The
scaling definition for glideslope, VNAV, and VNAV approach are
as follows:
GS/GP
75 pA/dot
VNAV 250 ft/dot
VNAV APP 75 ft/dot
(2) Calibrated Airspeed/Mach $cale
The CAS/Mach scale presentation is located to the left of the
attitude sphere as in a conventional “T” arrangement. The CAS scale
is presented for altitude less than 25,000 feet (Figure 204). The
display can be selected to a Mach scale above 25,000 feet (Figure
203) via the display controller or through the flight guidance
system. Each display is configured to be a moving tape with fixed
current value pointer.
The tape markings, current value data, and
current value pointer are white with gray background shading for
display enhancement.
(a) Calibrated Airspeed Scale (CAS)
~ Calibrated Airspeed Analog Scale - The white scale markings
on the tape are shown at 10-knot intervals. The markings
are labeled every
10 knots below 200 knots (Figure 204) and
are labeled every 20 knots above 200 knots.
~ Calibrated Airspeed Digital Readout - A digital readout of
the actual airspeed is magnified and displayed within the
current value pointer.
The digital data is displayed in
white using a digital rolling drum presentation readable to
a 1 knot resolution.
22-14-00
Page 216
Apr 15/93
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