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denotes Left or Right; and XXX.X signifies the distance in
Kilometers or Nautical Miles, dependent upon units
selected by the the CPG, and displayed in line 7
(DSPL:KM or DSPL:NM).
Line 5. Displays the legend MODE:LAND or
MODE:WATER in the left-hand character field. The righthand
character field displays the legend HBCMO Þ if
the DNS system status is GO; otherwise this field is
blanked.
Line 6. -Blank.
Line 7. The left-hand character field displays the legend
MODE:UTM or MODE:L/L signifying coordinate data
entry methodology. The right-hand character field
displays the legend DSPL:KM or DSPL:NM signifying
metric system or nautical system, respectively, in use.
Line 8. This is the scratchpad line for manual data entry.
3-64.6 Change 3
5
TM 1-1520-238-10
Table 3-22.2. ADMIN SUB-PAGE VARIABLE ACTION BUTTONS
Control/Display Function
VAB 1 Used for manual entry of MONTH DAY YEAR update data (MMDDYY) when the
outlined arrow is (0) displayed in character position 1 on line 1, and character string is
present in the scratchpad. Valid entries are: 01-12 for MM; 01-31 for DD; and 00-99 for YY
VAB 2 Used for manual entry of Altitude update data. Positive altitude is assumed and does not
require a "+" sign; Negative altitude (below MSL) requires a minus (-) sign preceding the
altitude value. Altitude ranges are -900 feet MSL to 20000 MSL. Altitude is always
displayed in feet.
VAB 3 Used for selecting MODE:LAND or MODE :Water navigation operations. System
defaults to MODE:LAND at power up. Depressing VAB 3 toggles between two choices.
VAB 4 Selects the data presentation format to be used for PPOS, CPOS, WAYPOINT, and
TARGET coordinate data entry. System defaults to MODE:UTM at power up.
Depressing VAB 4 toggles between MODE:UTM AND MODE:L/L. Pages affected by
pressing VAB 4 are NAV, OFFSET, WAYPOINT and TARGET.
VAB 5 Used for manual entry of HOUR MINUTE SECOND update data (HHMMSS) when
the outlined arrow is (0) displayed in character position 22 on line 1, and character
string is present in the scratchpad. Valid entries are: 00-23 for HH; 00-59 for MM; and
for SS.
VAB 6 Used for manual entry of HG (barometric pressure). Valid entries are: 27.92 to 31.92.
Data is entered in scratchpad as XXXX; the decimal point entry is not required. This
entry followed by an altitude entry within 60 seconds will cause the system to
re-calibrate the ADS pressure sensor bias correction.
VAB 7 Used for selecting HBCM sub-page. Valid only if HBCM Ois present indicating the DNS
system is "GO".
VAB 8 Used for selecting DSPL:KM or DSPL:NM signifying metric system or nautical system,
respectively, in use for coordinate display. Depressing VAB 8 toggles between the two (2)
choices.
Change 3 3-64.7
6
TM 1-1520-238-10
c. HBCM Page. The HBCM page, (fig 3-26.3) is
used to START and STOP the bias calibration of the
DNS. VAB functions are explained in table 3-22.3. The
display has the following:
Figure 3-26.3. HBCM Page
Line 1. Displays the legend O START in the left-hand
character field; the HBCM title in the center character
field; and the legend STOPO in the right-hand character
field.
Line 2. Displays the legend(s) HBCM READY;.
HBCM ACTIVE, HBCM GO, or HBCM NO-GO as
appropriate in the left-hand character field.
Lines 3. & 4 If line 2 displays HBCM READY or HBCM
ACTIVE, lines 3 & 4 will display the current DNS velocity
biases. If line 2 displays HBCM GO, lines & 4 will display
the new DNS velocity biases. If line 2 displays HBCM
NO-GO, line 3 will display the HBCM fail condition. If a
second fail condition exists, it will be displayed on line 4,
otherwise line 4 is blanked. Possible DNS error
messages are:
TIME BELOW 2 MIN BIAS EXCEEDS 0.3 KTS
EXCESSIVE MEM Line 5. Blank.
Line 6. Displays the legend TIME: XX:XX in the left-hand
character field indicating elapsed time in
minutes/seconds for DNS computations of the bias
calibration. The timer will stop while the DNS is in
memory during the bias calibration. The legend MEM will
be displayed following ’TIME: XX:XC’ if the DNS velocity
is invalid; otherwise the rest of line 6 is blanked.
Line 7. The right-hand character field displays the legend
ADMIN>O.
Line 8. Blank.
Table 3-22.3. HBCM SUB-PAGE VARIABLE ACTION BUTTONS
Control/Display Function
VAB 1 Used to initiate or re-start the calibration of the Hover Bias. Pressing VAB 1 causes the display
on line 2 to change from "HBCM READY’ to "HBCM ACTIVE" and starts the timer display
located on line 6. Calibration time is dynamic and is displayed in minutes and seconds (M: SS).
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