TM 1-1520-238-10 3-50 Change 3 NOTE Refer to Data Entry and Operating Proce- dures (para 3.14.7.f and 3.14.8 ) as neces- sary. 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: M01-218-2 PWR OFF HBCM ADMIN TKAE XTKE ZERO MODE BACKUP DSPL Figure 3-15. ADMIN Page – PWR OFF M01-218-3 PWR ON HBCM ADMIN TKAE XTKE L ZERO MODE UTM BACKUP OFF DSPL KM LOO8 0.0 Figure 3-16. 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 nautical miles. 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 data. Line 6 – Blank.