DZ meaning in Military and Defence ?

A drop zone (DZ) is a place where parachutists or parachuted supplies land. It can be an area targeted for landing by paratroopers, or a base from which recreational parachutists and skydivers take off in aircraft and land under parachutes. In the latter case, it is often beside a small airport, frequently sharing the facility with other general aviation.

At recreational drop zones, an area is generally set side for parachute landings. Personnel at the site may include a drop zone operator or owner (DZO), manifestors (who maintain the flight manifest documents defining who flies and when), pilots, instructors or coaches, camera operators, parachute packers and riggers, and other general staff.