Dated 15 July 1971, this page opens the weapons delivery section of an F-4 Phantom aircrew procedures manual, laying out the baseline conditions used to calculate bombsight settings and the correction factors applied for variations in aircraft weight, air temperature, and target altitude. Details like minimum release altitudes and fuze-arming safety margins reflect the exacting technical discipline behind every bombing run flown from Da Nang Air Base during the Vietnam War, where precision and crew safety depended on getting the numbers exactly right. Project: 218454