TAB A INCA EVENT _OPERATION REDWING 1. i The INCA device was fired at 09564, 22 June 1956, from atop 200-fcot tower located on RUJORU Island (PEARL) of ENITWETOK ttoll. Rs “he Domb cloud reached an estimated height of 42,000 feet. 23 clovd meved to the vest at approximately 10 knots. The sten The stem ipoearec to contain more surfece debris than usual for tover shots of : ‘Wiar magnitude and height cf burst, 2. The fallout forecast was based on a vield of he astual yield exceeded this value by aprroximately 3. cast, Initial helicopter and P2V surveys verified the fallout fore- 2 oe Shot island and the lagoon erea to the west were the only arsas ihich geve appreciable radiation reacings, 1@7 aircraft to a range of 100 mites, The cloud wes tracked oy At 100 miles the cloud was iporoxtimately 50 miles long and 15 miles across with an average intensity cf 50 mrfbr at 10,000 feet altitude through INCA plus 3 days. \ 5. Based on the radiological surveys of the atoll by helicopter : oJ ind P2Y aircraft, reentry hour wes announced as 1200M, 22 June 1956. foe, Tao Bo Deleted.