TM 1-1520-238-10
3-60
Change 3
n. CDU Validity Checks for LATT/LONG Coordi-
nate Data.
The CDU checks the parameters of all data
entered into the scratchpad. Any nonvalid characters are
flagged as erroneous. Valid parameters are shown in
table 3-20.
Table 3-20.
LAT/LONG Coordinate Data
Parameter
Valid Entries
PPOS Latitude
1st Character
N or S only.
PPOS Latitude
Degrees
00 – 84 for North latitude degrees.
00 – 80 for South latitude degrees.
PPOS Minutes
00.0 – 59.9.
PPOS
Longitude 1st
Character
E or W only.
PPOS
Longitudinal
Degrees
000 – 180.
PPOS
Longitude
Minutes
00.0 – 59.9.
Magnetic
Variation
E or W and 0 – 180.0 degrees.
FLY TO
1 – 19 and H or 0. H and 0 are synonymous.
o. Waypoint Dictionary Pages and Transfer Func-
tions.
Up to 20 waypoints can be entered into the way-
point dictionary at one time. The waypoint dictionary
pages are accessed via the FPLN FAB. If the CPG de-
sires to change display modes (UTM or LATT/LONG) be-
fore making entries into the waypoint dictionary, perform
steps 1 and 2. If the mode does not need to be changed,
go to step 3.
1. ADMIN – Press. Observe that the ADMIN page
is displayed.
2. MODE UTM – Press. Observe that MODE UTM
changes to MODE L/L or vice versa and after
three seconds the NAV top level present posi-
tion page is displayed.
3. FPLN FAB – Press. Observe that FPLN way-
point dictionary page 1 is displayed (Waypoints
home, 1 and 2).
NOTE
Refer to UTM or LATT/LONG coordinate
entries for waypoint dictionary paragraphs
for entry details. Refer to CDU validity
checks for UTM or LATT/LONG coordinate
data for data entry parameters.
4. Enter the desired coordinates into the scratch-
pad.
