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SIERRA LEONE 1960 32
SOUTH AMERICA:
PROVISIONAL SOUTH AMERICAN 1956 33
CORREGO ALEGRE 34
CAMPO INCHAUSPE 35
CHUA ASTRO 36
YACARE 37
TANANARIVE OBSERVATORY 1925 38
TIMBALAI 39
TOKYO 40
VOIROL 41
SPECIAL DATUM(SD) MGRS RELATED
TM 1-1520-240-10
3-3-34
Table 3-3-4. Map Datum Codes - (Continued).
Map Datum Data Code
SD, INDIAN SPECIAL 42
SD, LUZON SPECIAL 43
SD, TOKYO SPECIAL 44
SD, WGS-84 SPECIAL 45
WGS-72 46
WGS-84 (Default map datum) 47
3-3-53. GPS Data Loader Receptacle. (fig. 3-3-9)
The GPS data loader receptacle allows the operator to
load pre-programmed navigation information into the
GPS receiver. This navigational information, such as way
point position, DTM or almanac data is pre-loaded on a
data loader module, part number 164191-01-02 or
164191-03-01, if Unit Operations and mission dictates.
3-3-54. Controls and Function - GPS Data Loader
Receptacle.
Controls of the GPS Data Loader Receptacle are as
follows:
CONTROLS/
INDICATOR
FUNCTION
RELEASE
Pushbutton
When Pressed, releases
Data Loader Module from
Data Loader Receptacle.
3-3-55. Normal Operation - GPS Data Loader Receptacle.
Perform the following steps in sequence to operate the
data loader system:
a. Turn on the GPS System. Allow system to warm up
and time in for approximately one minute.
NOTE
Loading data loader must be done in INIT
Mode.
b. Insert data loader module into data loader receptacle.
Wait at least 30 seconds before switching to another
mode. Display momentarily flashes when information
has been successfully transferred.
c. Locate module release button on left side of data
loader receptacle. Release and remove data loader
module from data loader receptacle.
d. Verify operation of data loader system by:
(1) Turn GPS Data Select switch to POS.
(2) Select a way point that is known to be preprogrammed.
(3) Compare data displayed with known programmed
data.
(4) If other selections are to be checked,
rotate Data Select switch to position desired. Then
compare data displayed with the known programmed
data.
(5) Repeat steps (1) thru (5) as desired for any
or all remaining way points.
(6) GPS should now be ready for use during
flight operations.
3-3-56. GPS KYK-13 Remote Fill Panel. (fig. 3-4-2)
The GPS KYK-13 Remote Fill Panel allows encryption
data to be loaded from a KYK-13 or KOI-18 fill devise.
Reference will only be made to the KYK-13.
3-3-57. Controls and Function - GPS KYK-13 Remote
Fill Panel. (fig. 3-4-2)
Controls of the GPS KYK-13 Remote Fill Panel are as
follows:
CONTROLS/
INDICATOR
FUNCTION
LOADS
STATUS
LED
Provides positive indication that
GPS receiver has successfully
received crypto key fill.
INIT
LOAD
switch
When pressed, causes the
transfer of crypto key from fill
devise (KYK-13 or KOI-18) to
GPS receivers
3-3-58. Normal Operation - GPS KYK-13 Remote Fill
Panel.
To load keys from KYK-13 into the GPS receiver:
NOTE
The GPS receiver does not need to be on to
load keys with the KYK-13 Fill Devise.
a. Connect KYK-13, either directly or using a fill
cable, to KYK/GPS FILL J1 receptacle located on the
Remote Fill Panel (Figure 3-4-2).
b. Turn KYK-13 Fill switch to desired position.
c. Turn KYK-13 Mode switch to ON.
d. Press LOAD INIT switch on the Remote Fill Panel
(Figure 3-4-2). Wait approximately 5 seconds. If key was
successfully loaded, Load Indicator light on the Remote
Fill Panel will flash.
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 information
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 attempt
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