> as lemmas

1945 By Air to Battle (H.M.S.O.) 39 It was left to the battalion commander..to share with the pilot the responsibility of choosing the dropping zone from the air.

1956 J. Tickell Moon Squadron viii. 83 In ten minutes, we would be over the DZ or dropping zone.

1968 A. J. Jackson Blackburn Aircraft 469 The rear doors were removed for a demonstration over an Army dropping zone at Amesbury, Wilts.