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DIST XXX.XKM. DIST is displayed in KM (kilometers)
when the coordinate system in use is metric, and in NM
(nautical miles) when the coordinate system in use is
nautical. The display uses a floating decimal point
allowing a distance accuracy of 10 meters (32 feet) when
DIST is less than 100 KM units. The DIST numerals are
updated at the rate of 1Hz regardless of aircraft speed.
The right-hand character field displays
the legend TTG X:XX to the FLY-TO destination in
Hours and Minutes (H:MM). When less than five (5)
minutes from destination, these units change to Minutes
and Seconds (M:SS). If TTG to the FLY TO exceeds 9
hours and 59 minutes, or the aircraft ground speed is
less than 10 knots, the display is dashed. Both of the
character fields are read-only and cannot be edited.
Line 5. Displays the legend TKA XXXDEG and GS
XXXIPH. TKA denotes the computed Track Angle, in
Degrees (DEG), while GS reflects Ground Speed. GS is
presented in Kilometers Per Hour (KPH) or Knots (KTS)
dependent on display selected. The units for both DIST
and GS are the same for a given selection: KM and
KPH, or NM and KTS.
Line 6. Displays the System Annunciator Data which
consists of three elements: A DNS Memory (MEM)
element; a Navigation Status (NAV STAT 1-3) element;
and a Check FDLS (V FDLS) element. These status
messages may appear at any time on this line. A display
on this line indicates that the DNS has either lost radar
lock (MEM); the navigation error exceeds certain
parameters (NAV STAT 1-3); or, the Continuous FDLS
test has detected a fault in the system (/ FDLS).
Navigation Status categories are as follows:
NAV STAT 1: Estimate of position error calculation is
less than 50 meters. Actual position error may be
substantially less. PPOS updates are disabled.
NAV STAT 2: Estimate of position error calculation at
least 50 meters but less than 201 meters. Actual position
error may be substantially less. All PPOS update
operations are enabled.
NAV STAT 3: Estimate of position error calculation is
greater than 200 meters. Actual position error may be
substantially less. All PPOS update operations are
enabled.
Line 7. The left-hand character field displays the legend
Þ FLY TO TXX or Þ FLY TO WXX, depending upon
the selected destination to which the system is
navigating. The displayed value can be any of the 40
waypoint locations in the FPLN List; or any of the 40
target locations. Þ UPD TO WXX displayed indicates
the destination to which the system is being updated.
The right hand character field displays the legend STR
WXX representing the waypoint number (from 31-40) to
be used by the system for the next PPOS store.
Line 8. This is the scratchpad line for manual data entry.
Change 3 3-64.5
4
TM 1-1520-238-10
b. Administration (ADMIN) Page. The ADMIN page
(fig 3-26.2), is selected by depressing VAB 6 on the
NAV Top Level Page. VAB functions are explained in
Table 3-22.2. The ADMIN page contains the
following:
Figure 3-26.2. ADMIN Page Top Level
Line 1. Displays the example legend Þ 12/24/94
denoting the current Month, Day, and Year., separated
by slashes (/) in the left-hand character field. Update of
this field is automatic through GPS data, and when
updated, the O is blanked. If the system has no date
available (GPS or Manual), this field is displayed as
dashed (--/--/--). The current time example legend
15:42:18< is displayed in the right-hand character field
representing Hours, Minutes, and Seconds, separated by
a colon(:), in that order. If GPS time is not valid,( <: is
displayed), manual update to the system is permitted.
Line 2. Displays the centered page title ADMIN.
Line 3. The left-hand character field displays an outlined
arrow and the legend Þ A XXXXXT reflecting
the current aircraft altitude. This altitude value is always
displayed in Feet only, and is referenced to MSL.
Positive altitude above MSL is displayed with a blank
preceding the altitude readout; negative altitude (below
MSL) is displayed using a minus (-) sign preceding the
altitude readout (A-XXXXXFT). The right-hand character
field displays the legend HGXX.XX< denoting the current
Barometric pressure setting.
Line 4. -The left-hand character field displays the legend
TKAE L XXX.. TKAE represents the current Track Angle
Error; L or R denotes Left or Right; and the XXX signifies
the angle error in degrees. The right hand character field
displays the legend XTKE L XXX.
XTKE represents the current Cross Track Error; L or R
　
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