Refer to Data Entry and Operating Proce-
dures (para 3.14.7.f and 3.14.8 ) as neces-
Line 1. PPOS represents the current DNS computed
present position in either UTM or LAT/LONG. The PPOS
data may be changed or edited.
Line 2. var and sph are the magnetic variation and
spheroid associated with the PPOS. var and sph may be
changed or edited.
Line 3. BRG is the direct bearing to the destination spe-
cified in the FLY TO position on line 7. ADMIN is a VAB
label that selects the page for the various administrative
functions associated with the DNS.
Line 4. DIST and TTG are the distance and time-to-go
(at current ground speed) to the destination specified in
the FLY TO position. DIST will display in either kilometers
or nautical miles, independent of the PPOS data, as se-
lected on the ADMIN page.
Line 5. TKA and GS are the computed track angle and
ground speed. Ground speed may be displayed in either
kilometers per hour (KPH) or knots as selected on the
ADMIN page. The units for both DIST and GS are same
for a given selection: KM and KPH, or NM and KTS.
Line 6. This is the CDU and DNS status line. The line
may be blank or display MEMORY, BACKUP, or FDLS.
A display on this line indicates that the DNS has either lost
radar lock: MEMORY; the CPG has manually selected
BACKUP; or the Continuous FDLS test has detected a
fault in the CDU/DNS system.
Line 7. FLY TO shows the selected destination to which
the DNS is navigating. The displayed value can be any of
the 20 locations in; the FPLN dictionary; 0 (or H) through
19. The FLY TO number can be changed. TGT displays
the storage location that will be used next when the STR
FAB is pressed; locations 16 to 19 are used repetitively.
Line 8. This is the scratchpad line for data entry.
b. ADMIN Page.
The ADMIN page (fig 3-15 and
3-16), is used to select other modes of DNS operation and
administrative DNS management and display functions.
The ADMIN page has the following:
ADMIN Page PWR OFF
ADMIN Page PWR ON
Line 1. PWR OFF or PWR ON is an alternate action VAB
powering the DNS. HBCM selects the Hover Bias Calibra-
tion Mode page.
Line 2. Identifies the ADMIN page.
Line 3. TKAE is a data display only showing the Track
Angle Error. The L or R character specifies which direction
to steer to reduce the TKAE to zero. XTKE is a data dis-
play only showing the Cross Track Error in kilometers or
Line 4. Blank.
Line 5. ZERO is a function which permits zeroizing the
CDU or DNS memory. The specific system to zero is ac-
complished by entering either CDU or DNS in the scratch-
pad and pressing the ZERO VAB. Zeroizing the CDU will
FPLN dictionary storage locations to default values. Zero-
ing the DNS will cause loss of HBCM data. MODE L/L or
MODE UTM is an alternate action VAB selecting the coor-
dinate system for display and data entry of coordinate
Line 6 Blank.