English: The array of target ships in Bikini lagoon for the Baker shot of Operation Crossroads, July, 25, 1946. The ten red X's mark the ten ships that sank. The black circle, with a radius of 1,000 yards from the point of detonation, outlines the area of serious ship damage. The blue circle, 330-yard radius, marks the rim of the shallow underwater crater created by the blast, as well as the circumference of the hollow water column which capsized the Arkansas. The submarines were submerged, the Pilotfish, ship #8, to a keel depth of 56 feet, and the Apogon, ship # 2, to a keel depth of 100 feet.