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1952 · Tremonton, Utah

The Tremonton film

On the record
Strength A · 9/10 · 3 independent
Evidence 4/4 · Witnesses 3/3 · Backing 2/3

A trained Navy photographer's film is released, and the Navy's own analysts could not identify the objects.

Plausibility High
Score 12 · 6 factors for, 0 against

A trained Navy photographer's film is released and Navy analysts could not identify the objects.

See the factors ↓

Natural cause proposed, not demonstrated
WhenJuly 2, 1952
WhereTremonton, Utah
Backing3 independent
Evidencesensor data, official records, documents

Navy Chief Warrant Officer Delbert Newhouse, an expert aerial photographer with over 1,000 hours of experience, pulled his car over and filmed 12 to 14 bright objects milling in the sky. Blue Book rated him honest and reliable. Navy photo analysts concluded the objects were not birds, balloons or known aircraft. A year later the CIA's Robertson Panel dismissed them as seagulls. war.gov has now released the film itself, the Blue Book file, the balloon tests, and Newhouse's own service record.

Evidence, in date order (3)

  1. 1952Project Blue Bookdocument
    case file rating the photographer honest and reliable war.gov: Blue Book file on the Tremonton film
  2. 2 Jul 1952Delbert Newhouse / National Archivessensor data
    the 1952 film itself, released on DVIDS war.gov video (on DVIDS): The Tremonton film, 1952
  3. 1953Navy photo analystsofficial
    found the objects were not birds, balloons or known aircraft war.gov: Navy film analysis, 1953

How plausible · High

A trained Navy photographer's film is released and Navy analysts could not identify the objects.

  • ●●
    Access Direct observation or instruments.
  • ●●
    No gain sought Nothing to gain.
  • ●●
    Character record Trained professionals.
  • ●●
    Checkable details check out Released official records.
  • ●●
    Fits the documented skeleton Fits the documented record.
  • ●●
    Physical traces or official reaction Instrument data or physical traces.

Plausibility weighs how well an account fits where secrecy hides the documents by design, so missing records never count against it. Strength measures what is documented. Assessed 2026-10-23.

On the record

  • The Tremonton film, digitised by the National Archives (on DVIDS).
  • Project Blue Book's file, its pillow-balloon comparison, and the Air Force flying-disc file for late 1952.Blue Book
  • Newhouse's final Navy personnel record.

Claims

The 'seagull' verdict was imposed to close a case the Navy's own analysts could not explain.speculationSourced, unconfirmedufologists

Where

Tremonton, Utah
41.7°N 112.2°W

war.gov files on this case (6)

PDFs (5)
PDFFilm Analysis of Unidentified Objects, 1953DOW · Release 05 · 1950, 1952
PDFFinal Personnel Record for Newhouse, Delbert C., U.S. Navy, 1957DOW · Release 06 · 1952-07-02
PDFProject Blue Book File on Tremonton Film, Utah, 1952DOW · Release 06 · 1952-07-02
PDFProject Blue Book Photo File Relating to Tremonton Film, Utah, 1952DOW · Release 06 · 1952-07-02
PDFU.S. Air Force Flying Discs File, 1952DOW · Release 06 · September - December 1952
Videos (1)
VideoHistorical Film of Reported UFOs, Utah, 1952DOW · Release 06 · 1952-07-02
‹ Previous in Air Force investigations: Sign to Blue BookWashington, 19528 of 16Next in Air Force investigations: Sign to Blue Book ›Nash-Fortenberry: eight red discs under a Pan Am DC-4

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Sources

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