ARMY TM 9-6675-349-12&P
MARINE CORPS TM 11039A-12&P
3-26. Adjacent Grid Zone.
NOTE
GRID ZONE is displayed on MENU only when display position format is UTM
and current IPADS position is within 40 kilometers of a UTM grid zone
boundary.
a.
Grid Zone Selection.
When operating within 40 kilometers of a UTM grid zone boundary, UTM coordinates can be displayed
with respect to the normal grid zone or the extended zones east or west of the boundary. EXT after the
zone number indicates UTM coordinates are relative to extended east or west zone. Perform the following
steps to change grid zone reference:
CURRENT PLUMB BOB DATA
EAST: 239632.00 M
NORTH: 4303840.50 M
ALTITUDE: 326.6 M
GRID ZONE:
18 EXT
ELLIP: WGS 84
DATUM: WGS 84
(1) Scroll to GRID ZONE on MENU and press ENTER. ZONE FUNCTION page is displayed with
instruction PRESS F1 FOR NORMAL; F2 FOR WEST GZ (xx); F3 FOR EAST GZ (yy), where xx is
the extended west zone number and yy is the extended east zone number. Function key line shows
F1-NORMAL, F2-WEST GZ, F3-EAST GZ, and F9-EXIT.
ZONE FUNCTION
ZONE IN USE: NORMAL
PRESS F1 FOR NORMAL; F2 FOR WEST GZ (xx); F3 FOR EAST GZ (yy)
F1-NORMAL
F2-WEST GZ
F3-EAST GZ
F4-
F5-
F6-
F7
(2) To change ZONE IN USE, press F1 for normal zone, F2 for extended west zone, or F3 for extended
east zone. Selection is displayed in ZONE IN USE field.
(3) If setting is correct, press F9 to exit ZONE FUNCTION page.
b. Grid Zone Boundary Crossing.
IPADS sounds the audible alarm and flashes function key legend F5-ZONE when it crosses the boundary
between two grid zones for the first time in a mission. Operator performs following steps when this occurs:
(1) Press F5. ZONE FUNCTION page is displayed with instruction PRESS F1 FOR NORMAL; F2 FOR
WEST GZ (xx); F3 FOR EAST GZ (yy), where xx is the extended west normal zone number and yy is
the extended east zone number. Function key legend shows F1-NORMAL, F2-WEST GZ, F3-EAST
GZ, and F9-EXIT.
(2) Press F1 for normal zone, F2 for extended west zone, or F3 for extended east zone. Selection is
displayed in ZONE IN USE field.
(3) If setting is correct, press F9 to exit ZONE FUNCTION page.
(4) IPADS will retain the new setting for subsequent crossings of the zone boundary. However, when
IPADS goes outside the 40 km zone overlap area, operation automatically switches to normal zone.
3-62
