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E-006352LANDMARK CASE · HIGH CORROBORATIONDATE PRECISION: exactRECORD COMPLETENESS: 100%

Zimmerman-Fisher Discs Circle Aircraft

June 12, 1950California quarry, California, United States

Geologist John Zimmerman and civil engineer Charles Fisher reported three silvery discs repeatedly looping around a high-flying swept-wing aircraft and crossing its vapor trail.

// LINKED CLASSIFICATIONS:Disc / Saucer(C-000253)→Scientific & Observational Types(P-000101)→
Claims are displayed with the source wording, locator, relationship and verification state. Competing claims remain separate rather than being averaged into a single answer.
SOURCE COMPARISON

Encounter · Reported Encounter Observation

HOW TO READ THIS →
CLAIM-689135reported
“Geologist John Zimmerman and civil engineer Charles Fisher reported three silvery discs repeatedly looping around a high-flying swept-wing aircraft and crossing its vapor trail.”
The UFO Evidence
SRC-002107 · Zimmerman-Fisher Discs Circle Aircraft encounter narrative; uploaded PDF pp. 82-82
SUPPORTS
SOURCE COMPARISON

Zimmerman-Fisher Aircraft-Circling Discs (1950) · Hall Phase 04 Source Description

HOW TO READ THIS →
CLAIM-689134reported
“Hall describes three silvery discs circling an aircraft and repeatedly crossing its vapor trail; their apparent diameter was estimated relative to the aircraft rather than instrumentally measured.”
The UFO Evidence
SRC-002107 · Zimmerman-Fisher Aircraft-Circling Discs (1950) source description; uploaded PDF pp. 82-82
SUPPORTS
SOURCE COMPARISON

Hall Scientists & Engineers Dossier · Hall Phase 04 Source Description

HOW TO READ THIS →
CLAIM-689132reported
“Hall opens Section VI by emphasizing reports from professional scientists and engineers and discussing barriers to public reporting.”
The UFO Evidence
SRC-002107 · Section opening and professional-observer discussion; uploaded PDF pp. 81-82
SUPPORTS