MICROFILM PUBLICATIONS Publication PROJECT BLUE BOOK (Administrative) ADMINISTRATION WASHINGTON: HEADQUARTERS WRIGHT-PATTERSON UNCLASSIFIED When drawings, specifications, and other dat are furnished to manifactarers, 1 OF: conveying an; ire, use, OF sall way be related thereto, . eal rmraetal! UNCLASSIFIED : oe UNIDENTIFIED AERIAL OBJECTS PROJECT "SIGH" LH, trusting a A. B. Deyarmond, Technical Intelligence telligence Department, CLASSIFIED INTERVALS; descriptive analytical unidentified countries, presented. Individual analytical qualitative generalized presented, ble and will establishing or,tenability characterized sufficient information conelusions identified UNCLASSIFIED Intelligence Number:-X3-506, referenced Assistence observations accordance gfechnical Instructions Evaluation Unidentified incidents, astro-physical phenomena, accomplished University aecordance information Scientific gonsulting UNCLASSIFIED INTRODUCTION accomplished uniientified evaluation available. specialists astrophysics psychology, information evaluating explanations sightings. information investigation headquarters possibility unidentified inefdents. distributed ind{vidual evaluation. 3 cooperating summaries reproductton Didtribution distributed govafhment investigative many factors such as other atmospheric sour launchings, commerial siderations, Based on the po: explanations ibility that th unconventional aerodynamic, pulsion,-and classifications configural State Universit: balloon-sheped aarodynamic asrostatic propellsd-and controlled aeronsutical destgners. Approximately conventional satisfaction Verbal.statements astro-physicist possibility appreofable of their investigaticns reasonably satisfactory explanations thirty (30) foreign uimarized, repro- psychologists Aero-Medical Laboratory The. possibility that soue.of the indidents may repres=nt technical developments far in advance vf kmowledze available to engineers. and sotentiats of thie country has been considered. No facts are available to pergonnel at this Cohmand that wfll permit. an objective assesamert of this possibility. All infor~ mation so far presented on the possible existence of space ships from another planet or of aircraft propelled by an advanced type of atomic power plant have been largely conjecture. Based on experience with nuclear powsr plant ressarch in this country, the existence on Earth of such engines of small enough size and weight to have powered the objects described is highly impmwbable. Reports of unidentified flying objects are not peculiar to. the present time. In, "The Books of Charles Fort" by Tiffany Tay- Tor, published in 1941 by Henry Holte & Co., New York, similar phenomena are described as having been sizhted during past cen turies. In the last war, numerous sightings of "balls of fire"- in the atr were reported by bonber crews. ie aS UNCLASSIFIED Puture activity on this project should be carried on at the mintmum level necessary to record, summarize, and evaluate the data received on future reporta and-to complete the specialized investigations now in progre: When and if a sufficient number of incidents are solved to indicate that these sightings do not represent a threat to the security of the natioh, the assignment of special project status to the activity could be terminated. Puture investigations of reports would then be handled on a routine basis like any other intelligence work. Reporting agencies should be impressed with the necessity for getting more facttal evidence on sightinzs, such as photographs, physical evidence, radar sightings, and data on size and shape. Personnel sighting such objects should engage the assistance of others, when possible, to get more definite data. Por example, nilitery pilots should notify neiziboring bases by radio of the presenoa and direction of flight of an unidentified object so that other observers, in flight or on the ground, could at in its identification. : ~ SONCLUSTONS conclusive unidentified uncanvertional configuration. examination non-existence impossible reasonable convincing explanation determined apparently unsatisfactory observation, description photographs, individual observers, descriptive conclusions Explanations, understandable possibility associated occurrences: Bwaluation unidentified intelligence sightings, inevitable, conditions convincing odcurrences personnel. considered establishment procsdures UNCLASSIFIED. by technical personnel. of the dividua: to appropriate government ajencies, graphical methods have been appl: will be made apparant.. (See Appendix B). The prepared graphical data incltides: 1. Type of objact observed comme rial, (a) Locations of radio beacon stations . and assistence may be derived (n)- Flight patks of migratory birds UNCLA. SSirep (g) Past, current, and projected celestial phenomena A : DISCUSSION ~ or, tion of Date on Incident. . Sete 6 oS : bs 2 Approximat*ly 243 domestic incidents have been reviewed, at the present time. In each incident, the observors have been interrogated by investigators and tke results have deen analyzed Condensad summaries have. been prepared for the-list of in- cidents in sufficient cuantity to make the basic information - individuals or an-interest in the project. (See Appendix A). A detailed check list, cowpiled by technical personnel, in- Afonting the basic elenents of information, necessary for analydis inc incident, has been prepared and distributed In-order to identify ordinary and conventional objects, that have probably been included in the list of reported incidents, 80 as to prasent the basic data in.such form that overall facts, implicit'in the grouped -data, (a) Charts concerning unidentified aerial objects, to indi- 2. Vicinity fm which particular type of object was ob- Z _ , 3. Dirsetion of flight (b) Locations of guided missiles, research and related if (e) Locations of airlines, eirfields, both military and (e) Known or projected radar stations from which reports (tf) Meteorological stations from which balloon release data, Padiosonde or theodolite readings may be obtained @ UNciAssime Psychologteal Analy: psychological Aero-Medica? Laboratory, preliminary professional, psychologists considerable occurrences misrepresented, "vertigo", considered incidents. Dictionary "Dizziness disturbance stationary, dirsotions, stomach,or Accelerations, fragairplans mancuvers, space-orientation difficulties strangness references, night-flying conditions, impressions individuals experienced accelerations surroundings conditions (including and-canopy 1llustons. engineering. paychological psychological observation. Informatign Specialist supplementary information twenty-four UNCLASSIFIED UNCLASSIFIED, Unixersity contracted estrondmical planetoids associated phenomena. University Astro-Physicist University Observatory undertaken While this work has not yet. been completed, Professa Hynek has reported verbally that he is satisfied-that a number of the re~ ported observations represent astro-physical phenomena. Members of the Scientific Advisory Board to the Chief of consultant include Dr. Irving Langmuir, Chief, General Electric Research and Dr. G. E. Valley of MIT. - A preliminary type of interview has been held between Dr. Langmuin and personnel of Project "Sign during early stages of the project. It 1s intended to consult further with Dr. Langruin in an effort to supplemant present technical efforts toward iden- s tifying the reported objects Dr. G. B. Valley has displayed an active interest in Project standpoint feasibility. this report. js the reported observations may have represented "space ships" or Corporation, standpoint fundemental information, pertaining performance characteristics distinguish preliminary undertaking, possibility development Department information lightning". requested represented lightning". 1{ghtning undetermined authorities Investigation instances, investigations endreliability investigative UNCLASSIFIED UNCLASSIFIED Considerations Eveluation OPERATIONAL possibility ty-classified