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Operation Mainbrace

Sighting

NATO naval exercise reports luminous discs shadowing ships and jets across the North Sea

Witnesses — NATO naval exercise reports luminous discs shadowing ships and jets across the North Sea

Evidence — Documents

Status — Unknown

Disclosure Rating — 3/10

  Fleet sightings

During the NATO exercise Operation Mainbrace, sailors and pilots observed bright objects maneuvering near warships and aircraft. Reports came from multiple nations and radar stations.123

  Military interest

British and American investigators logged the sightings but offered few explanations. Some suggested atmospheric phenomena while others considered secret technology or extraterrestrial visitors.45

  References

  1. nicap.org ↩

  2. bluebookarchive.org ↩

  3. ufocasebook.com ↩

  4. nationalarchives.gov.uk ↩

  5. theguardian.com ↩

Occured on September 19, 1952

1 min read