When and where was Lake Michigan L-1011 Silvery-Disc Pass documented?

This encounter was documented on July 4, 1981 in Lake Michigan, Great Lakes, United States.

What sources and physical claims back the Lake Michigan L-1011 Silvery-Disc Pass record?

The ANOMALY archive indexes 1 independent source citations across 3 claims, achieving a provenance completeness score of 100%.

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E-009535LANDMARK CASE · HIGH CORROBORATIONDATE PRECISION: exactRECORD COMPLETENESS: 100%

Lake Michigan L-1011 Silvery-Disc Pass

July 4, 1981Lake Michigan, Great Lakes, United States

An L-1011 captain reported a silvery disc darting ahead and above the airliner, rolling to reveal a thin profile with six dark porthole-like markings before disappearing northward.

// LINKED CLASSIFICATIONS:Disc / Saucer(C-000253)→Physical Trace & Environmental Effects(P-000103)→

// PROVENANCE COVERAGE

100% record completeness

This measures documentation coverage, not whether the encounter or its claims are true.

1 SOURCES · 1 PRIMARY

Date documented

July 4, 1981

Location documented

Lake Michigan, Great Lakes, United States

Map coordinates available

Coordinate precision: region.

Catalogue classification linked

2 family link(s), 1 case-specific component(s).

Published citation-backed claims

1 encounter-target claim(s), 2 component claim(s).

Source coverage

1 unique source edition(s); 1 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.

// ASSESSMENT METADATA

Stored case-assessment fields

ENCOUNTER-CLAIM PROVENANCE PRESENT

Stored total witness estimate1

Stored verified-report count0

Instrumental evidence flagNO

Official investigation flagNO

// ENCOUNTER LOCATION · OPENSTREETMAP

COORDINATE PRECISION: REGION