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The Roswell Report: Fact versus Fiction in the New Mexico Desert was published by Headquarters United States Air Force in 1995. The Black Vault distributes this copy. It reproduces the report by Col. Richard L. Weaver and the synopsis by 1st Lt. James McAndrew, both written after a General Accounting Office inquiry requested by Representative Steven Schiff. The Air Force search found no evidence of an extraterrestrial craft or crew. It concluded that the Roswell debris most likely came from NYU Flight No. 4, a Project MOGUL balloon train.
“Sea”23 pages
# LONG RANGE SOUND TRANSMISSION IN THE ATMOSPHERE A Report for General Carl Spaatz prepared by Maurice Ewing I THE SOUND CHANNEL IN THE OCEAN Under a contract with the Bureau of Ships, we have proved that there is a sound channel in the ocean with its axis at a depth of about 4000 feet. Confirming a prediction made by the writer, a four pound bomb fired at this depth has been heard at a distance of 2300 miles, using a hydrophone at the same depth as a receiver. This range enormously exceeds anything before achieved, and is possible primarily because the source and the receiver are placed at the most advantageous depth. The signal strength indicates that far greater ranges can be obtained without change of equipment. At a typical place in the ocean, the speed of sound at the surface is 5001 ft/sec. It decreases to 4888 ft/sec at a depth of 4000 feet, and then increases to 5065 ft/sec at a depth of 16,200 feet. This situation is described as a sound channel with its axis at 4000 feet, because all sound rays are deflected downward at points above the axis and upward at points below it. Detailed calculation of the bending of the ray paths due to pressure and temperature shows that all rays leaving a sound source on the axis in directions within 12° of the horizontal are refracted back and forth across the axis and can travel unlimited distances without contact with surface or bottom, hence the long ranges. A similar calculation for a sound source near the surface shows that all rays must be reflected at surface and bottom many times in the course of a few hundred miles, hence the limited range of detection of ordinary shallow explosions, and the occurrence of skip distances. The sound from an explosion at the axis of the sound channel has a duration of about 12 seconds per thousand miles of travel, and an unmistakable pattern of a gradual building up to maximum intensity with a very sharp out-off. This last feature is of great importance because it permits accurate triangulation with a network of three listening stations, the rate of transmission being about one mile per second. (Reference 1) SECRET
Report, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 882 pages are in the text index: search them above, or from the library's search.