キャッスル作戦
Full radioecology recovery surveys were documented before and after each test series. For a brief online introduction into some of these studies—with specific reference to the ecological effects of the 1.69-megaton Operation Castle "Nectar" shot, detonated in 1954 on a barge just north east of the crater of the 10.4-megaton Ivy Mike thermonuclear test - see a report by the University of Washington's Laboratory of Radiation Biology and .