ARMY TM 5-6675-308-12
MARINE CORPS TM 08837A-12/1A
STATUS
h. If the malfunction does not clear, turn
system off and reinitialize.
INDICATOR
OPERATION
(1) Stop vehicle and set
"STOP" "GO", or
i.
If the malfunction does not repeat,
brake.
continue with mission.
(2) Press STOP.
If the malfunction still exists, locate
j.
and record the malfunction per steps a,
Z-VEL
(3) After a few seconds.
b, and c. Discontinue the mission and
return system to support maintenance.
(4) Correction completed.
Whenever the PADS is turned in, the non
(5) Vehicle moves.
zero display recorded in steps a through c
should be furnished to the support mainte-
If the vehicle moves before a zero-velocity correc-
c.
nance personnel.
tion is completed, the time automatically reverts back
to the prior zero-velocity countdown time.
d. In order to obtain the PADS specified accuracies for
battalion survey, the operator must perform
10-minute zero-velocity corrections. For division
artillery survey, the operator must perform 5-minute
Failure to perform zero-velocity correc-
zero-velocity corrections.
tions when requested may cause survey
mission failures.
NOTE
Do not set the Z-VEL interval to exceed
10 minutes as PADS accuracies will
Zero-velocity correction should be per-
degrade.
formed whenever the vehicle is stopped.
Frequent corrections improve survey accu-
NOTE
racy.
The Z-VEL interval may be changed by
Helicopters must land for zero-velocity
the operator, i.e., if a 5-minute interval is
corrections.
required for the fourth order survey, the
operator should perform the following
a.
Zero-velocity corrections are needed for accurate
sequence: Press M O N , ID, 4, 6, ENT,
surveying. One begins automatically during initial-
MON, 5, 0, ENT. The CDU display will
ization. Thereafter, PADS requests zero-velocity
display 5.0 as the Z-VEL interval and will
correction stops at 10-minute intervals. PADS auto-
remain this value throughout this and sub-
matically performs a zero-velocity correction at all
sequent missions until reset in the same
mark and update procedures.
manner. To change Z-VEL back to 10 min-
utes press MON, ID, 4, 6, ENT, MON, 1, 0,
PADS requests a zero-velocity correction by flashing
b.
0,ENT.
the GO and STOP indicators and beeping ALARM
The ATTN indicator lights if system errors are too
DS3 30 seconds before the next required correction.
e.
large during a zero-velocity correction. This can be
The operator has 30 seconds to stop the vehicle and
caused by: pressing STOP while a vehicle is moving;
press STOP. If he does not, the GO indicator extin-
not stopping when requested; or a PADS malfunction.
guishes, STOP indicator continues to flash, ALARM
Make sure the vehicle is stopped; press and hold
DS3 sounds steadily, and data display reads STOP.
Press TIME to disable ALARM DS3 for 30 seconds.
STOP to override the ATTN indicator. Release STOP
when ATTN indicator extinguishes and STOP
The sequence of operations is:
Change 3
3-36.11
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