31. Atomic depth bomb. By joint arrangement with the Navy, a deve lopment program for the depth bomb is now underway with the Navy being responsible for nonnuclear components and AEC for the | warhead. The XW-7 (Mark 7) warhead will be used fcr this purpose, The military requirement calls for a design providing detonation down to 2,000 feet, while assuring the safety of the delivering helicopter, blimp or airplane. The weapon is expected to be de- signed and tested by 1955-6 Rockets and Guided Missiles 32. Air-launched rocket. A military requirement was received in November 195e for the development of an air~launched, rocket- propelled atomic weapon, which will carry the XW-7 warhead. A joint arrangement with the Nevy will be employed for this development also. The air-leunched rocket will be designed to permit low-level tactical delivery from distances of 12,000 to 30,000 feet and from altitudes es low as 500 feet, while assuring safety of the delivering aircraft. It is expected to be designed and tested by the end of 1954. 33. Warheads for guided missiles. DOE ARCHIVES Chart III-A shows the design, production, and operational stockpile schedules of the warheads for the principal warhead-missile combinations currently being developed. Since the preceding Progress Report, development of XW-5/Major and XW-12/Air-launched rocket has teen susrended. New development Schedules for the XW-12/Talos are teing ¢evelored and the XW-13/Major previously shown has been redesignated the XW-13/Redstone. 34. During this period the first actual flight tests of