ev-intel-021bfb1a7898

AISS-UFOB-116-55 — 1955-04-28 — Naval Proving Ground, Dahlgren, Virginia

1955-04-28· Naval Proving Ground, Dahlgren, VirginiaResolved prosaic
Strangeness (S)
0.0
Credibility (P)
1.0
Evidence (EVID)
1.0
Date conf
9.0
Loc conf
0.0

Narrative

On 28 April 1955 at 1828Z, meteorological observers at the Naval Proving Ground in Dahlgren, Virginia spotted an unidentified flying object while taking PIBAL observations and tracking it with a theodolite. At 1828Z the object was at 31.8 degrees elevation, 48 degrees relative bearing, 16 miles from Dahlgren operations; by 1940Z it had moved to 19.8 degrees elevation, 50 degrees true bearing. Moving very slowly, the object dropped to 29 degrees elevation at 245 degrees relative bearing. Still visible 1 hour 12 minutes later. Ground-visual with theodolite and ground-electronic (air surveillance radar). Weather: scattered clouds, 15 miles visibility, SSW winds 25 knots. Possibly a weather balloon, though winds negative for that direction.

extracted via: llm_subagent_v1

Source documents (1)

Click filename to view on Internet Archive (where these are mirrored as public-domain US-government records).

Score evidence (7)

Why this event scored the way it did. Every contribution is traceable.

s

  • weather balloon (-2.0)
  • drift (-0.5)
  • outcome=resolved_prosaic (cap S<=3)
  • post-blend cap S<=3 (resolved_prosaic)

p

  • docs=1 (+0.5)
  • single agency (+0.5)

evid

  • narrative only (base 1)