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E-006728LANDMARK CASE · HIGH CORROBORATIONDATE PRECISION: exactRECORD COMPLETENESS: 100%
S.S. Iberville / BOAC / Pan Am North Pacific Halo
September 21, 1961North Pacific near Midway, North Pacific, International waters
The S.S. Iberville, a BOAC airliner and a Pan American airliner reportedly observed a large white halo or doughnut-like phenomenon moving across the North Pacific at about the same time.
// LINKED CLASSIFICATIONS:Scientific & Observational Types(P-000101)→Official Investigations & Programs(P-000105)→
// PROVENANCE COVERAGE
100% record completeness
This measures documentation coverage, not whether the encounter or its claims are true.
1 SOURCES · 0 PRIMARY
Date documented
September 21, 1961
Location documented
North Pacific near Midway, North Pacific, International waters
Map coordinates available
Coordinate precision: approximate.
Catalogue classification linked
2 family link(s), 3 case-specific component(s).
Published citation-backed claims
1 encounter-target claim(s), 3 component claim(s).
Source coverage
1 unique source edition(s); 0 marked primary for at least one claim.
Assessment has encounter-level provenance
1 encounter-target published claim(s) can carry assessment provenance.
This dossier currently depends on a single source edition; independent coverage would strengthen comparison.
No cited source is currently marked as primary for the published claims shown here.
// ASSESSMENT METADATA
Stored case-assessment fields
Stored total witness estimate5
Stored verified-report count0
Instrumental evidence flagNO
Official investigation flagYES
// ENCOUNTER LOCATION · OPENSTREETMAP
COORDINATE PRECISION: APPROXIMATE