TM 1-1520-240-10
3-3-35/(3-3-36 blank)
e. Repeat steps b. thru d. to load additional keys.
f. Turn KYK-13 Mode switch to OFF.
g. Disconnect KYK-13 from aircraft receptacle.
3-3-59. GPS Zeroize Switch. (fig. 2-1-8)
The GPS Zeroize switch is located on center instrument
panel, right side of AN/APR-39AV(1) Indicator, and is
used to erase any crypto data and all navigational infor-
mation stored in the GPS Receiver.
This zeroize switch consists of a guarded toggle switch.
3-3-60. Normal Operation GPS Zeroize Switch.
NOTE
Aircraft battery must be connected, or power
applied to aircraft.
a. Lift protective guard from zeroize toggle switch
and activate switch.
b. If GPS receiver is on, turn Data Switch to Stat.
Observe message on Page 1, Line 2.
The message ZEROED indicates a successful attempt
to erase information stored in the GPS receiver.
The message ZERO FAIL indicates an unsuccessful at-
tempt to erase the information. The GPS receiver re-
mains classified.
c. An alternate method to zeroize the GPS receiver
is to use the C-11702/UR and GPS Control Unit keyboard
as follows:
(1)
Select STAT page 1.
(2)
Enter ZZ on line 4, and push Line Select Key
4.
(3)
If ZEROIZED message is displayed on
STAT Page 1, Line 2, the GPS receiver is declassified.
(4)
If ZERO FAIL message is displayed, zer-
oization was not successful and the GPS receiver re-
mains classified.
Figure 3-3-9. Remote GPS Data Loader
Receptacle/KYK-13 Fill Panel
