Project Sign

Name: UFO Transparency
Creator: UFO Transparency
License: https://creativecommons.org/licenses/by/4.0/

1948 U.S. Air Force project to evaluate UFO reports, the first formal investigative program, replaced within a year by Project Grudge and ultimately Project Blue Book. Primary Project Sign records and the Estimate of the Situation references.

Files

Findings

Papers

1949-2024

Years

Primary documents · 5

PDFProject Sign Final Report, February 1949U.S. Army Air Forces / U.S. Air Force Air Materiel Command
PDFThe Condon Report (DTIC AD0680975)University of Colorado / U.S. Air Force (sponsor)
PDFAARO Historical Record Report, Volume I, 2024DoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Wikimedia MirrorDoD / All-domain Anomaly Resolution Office (AARO)
PDFAARO HRR Vol I, Pentagon Canonical PDFDoD / All-domain Anomaly Resolution Office (AARO)

Findings · 5

Scholarly research · 4

PAPERThe New Science of Unidentified Aerospace-Undersea Phenomena (UAP)Knuth et al. · 2025
PAPERAn environmental analysis of public UAP sightings and sky view potentialMedina et al. · 2023
PAPERUnidentified Anomalous Phenomena: Policy Implications for the Government of the United KingdomMcCaw · 2024
PAPERThe Prospect of Executive Branch UAP Secrecy: The Harm to Congress and Potential RemediesSkafish · 2024