Dated 15 July 1971, this page details the day and night visual signals used by strike aircrews to coordinate bomb release when radio communication failed. Hand signals like a cocked-pistol gesture or a closed fist pulled sharply downward told wingmen when to arm, count down, and release ordnance; at night, aircraft floodlights served the same purpose. Precision procedures like these allowed F-4 Phantom formations flying combat missions from Da Nang Air Base to safely coordinate bombing runs over Vietnam even without functioning radios. Project: 218454