Project Sign Progress Report, 1948
DOW-UAP-D097 · page 26 of 45
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CONFIDENTIAL Incident No. | Exhaust Trail | Heading | Altitude Ft. | Speed | Effect on Clouds 57 | Not stated | NME (30° E of true North on horizontal plane. | 30° off the horizon at an estimated 1/4 mile range. | High velocity, stated to be faster than a tracer bullet. | Not stated 58 | Not stated | N/W | 1000 | 510 mph. | Not stated 59 | Not stated | 350° later changed to 109°. | 9500-10000 | 1000 knots | Not stated 60 | Light flame color. | From N/W heading Eastward. | 6000 | Very high velocity. | Not stated 61 | Not stated | Northern | 2000-3000 | Faster than birds. | Not stated 62 | Not stated | Not stated | Several thousand ft. | High rate of speed. | Not stated 63 | Not stated | Northeasterly | 3000 | Tremendous Speed. | Not stated 64 | Not stated | Northeasterly | Not stated | Terrific | Not stated 65 | Not stated | West to East | 1000 | 1000-1200mph | Not stated 66 | Long straight white streak similar to the streak left by a tracer bullet. | North to South | Low | Required 3-4 seconds to travel 70° arc. | Not stated 67 | White trail of smoke. | Not stated | 500-1000 | Terrific | Not stated 68 | Not stated | Southeasterly | 6000 | Not stated | Not stated 69 | Thin streak of greyish color. | South | Not stated | Very fast. | Not stated 70 | Either smoke NE to SW or condensation lasting 2 seconds. | | 1000-3000 | 400-500 | Not stated 71 | May have been smoke or vapor from intense speed, was almost white. | Southeast then turned and went west. | Not stated | 7000-8000 | Not stated NND 927545 CONFIDENTIAL