787 Flight Crew Operations Manual
DO NOT USE FOR FLIGHT
Flight Instruments, Displays -
Primary Flight Displays (PFDs)
Copyright © The Boeing Company. See title page for details.
10.30.4 D615Z003-TBC
The FPV and FPA symbols are displayed in two sizes and brightness levels. The
large, bright FPV/FPA symbols are displayed when the previously stated
selections are made and the flight director is off. The small, dim FPV/FPA
symbols are displayed when the previously stated selections are made and the
flight director is displayed.
Radio Altitude
The current radio altitude is displayed in the bottom center of the attitude
indication area when radio altitude is below 2,500 feet AGL.
Navigation Performance Indications
Navigation performance scales and pointers present a real-time display of the
location of the LNAV and VNAV path relative to the airplane. The airplane
position is represented by the center index (or tic mark) on the scale and the LNAV
or VNAV path by a magenta pointer (triangle).
The sensitivity of the deviation indications varies depending on RNP. The
deviation represented by the distance from the center index to the outer index is
equal to the RNP value in the FMC. If RNP is equal to 1 NM, then the distance
between the center index and outer index represents 1 NM.
The ANP bars are anchored to the outer index, or tic marks, and vary in length
depending on the precision of the navigation system, When GPS updating is
available, the ANP value will be small and the bars will be short. When GPS
updating is not available, position uncertainty increases and the ANP bars grow
toward the center of the scale. The gap between the ANP bars represents the area
where the magenta pointer can be and the airplane still remain within the RNP for
that part of the route. (Refer to Navigation Performance
in Chapter 11, Section 31,
for additional information.)
The ANP bars are anchored to the outer index, or tic marks, and vary in length
depending on the precision of the navigation system, When GPS updating is
available, the ANP value will be small and the bars will be short. When GPS
updating is not available, position uncertainty increases and the ANP bars grow
toward the center of the scale. The gap between the ANP bars represents the area
where the magenta pointer can be and the airplane still remain within the RNP for
that part of the route.
February 15, 2010
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