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XYZ X‑3 preliminary name for high‑performance
third stage (Advanced Spartan) XDC control center for Nike‑X
system X‑Hour The
unspecified time that commences unit notification for planning and deployment
preparation in support of potential contingency operations that do not
involve rapid, no‑notice deployment (FM 5-0) X‑hour sequence Extended
sequence of events initiated by X‑hour that allows a unit to focus on
planning for a potential contingency operation, to include preparation for
deployment (FM 5-0) xmit transmit (use abbreviations in
graphics only) xmsn transmission (use abbreviations
in graphics only) xmtr transmitter (use abbreviations in
graphics only) XO executive officer; expenditure
order XRL extended‑range Lance xstr transistor (use abbreviations in
graphics only) xtal crystal (use abbreviations in
graphics only) XYrDev ten‑year device yardstick** Directive
to use A/A TACAN for ranging) yd yard (use abbreviations in
graphics only, FM 90‑26) YOB year of birth YOC Youth Opportunity Corps YP yield point (psi) YPG Yuma Proving Ground, Arizona YS yardstick; yield strength (psi) YTB yearly training brief (FM 7‑0) YTC yearly training calendar
(FM 7‑1) YTG yearly training guidance
(FM 7‑0) YTP yearly training plan
(ARTEP 7‑90‑MTP) Z Zulu Time (FM 1‑02) ZAP Request
for datalink information) ZD zero defects ZEMTR Zeus early missile test radar zeroing to align a sight to a point of
impact, as opposed to boresighting, which aligns a sight to an aim point zeroize to
return to zero (FM 3‑22.91) ZF zone of fire ZI zone of interior ziplip directive
call to minimize radio transmissions) ZOE zone of entry zone of fire (DOD)
An area into which a designated ground unit or fire support ship delivers, or
is prepared to deliver, fire support. Fire may or may not be observed (Army)
Usually utilized during amphibious operations. The zone of fire is used to
coordinate the efforts of the fire support ships and units with each other
and with the ground scheme of maneuver. The size and location of a zone of
fire is based on the ground force boundaries; the area in which the
supporting ships and units can provide effective fire; visibility; range of
the ship's guns; and the height of intervening terrain, also fire support area; fire support station; naval gunfire
support (FM 6‑20‑30) zone reconnaissance A
form of reconnaissance that involves a directed effort to obtain detailed
information on all routes, obstacles, terrain, and enemy forces within a zone
defined by boundaries. [Note: the Marine Corps definition adds: "A zone
reconnaissance normally is assigned when the enemy situation is vague or when
information concerning cross‑country trafficability is desired."]
See also reconnaissance (FM 3‑90) ZOS zone
of separation (FM 1‑02) ZSU (a Threat vehicle, FM 3‑22.1) ZTO zone transportation office Zulu Universal Time (FM 1‑02) |