IR-5-53 — 1953-08-20 — Mono Lake area, California (between georef EJAH2350 and EJBJ

On 20 August 1953 between 2105Z and 2115Z, the left and right scanners of TB-29 4076, 4th Radar Calibration Squadron, made multiple sightings of unidentified objects over Mono Lake area, California. TB-29 was at 15,700 ft heading 096D. The left scanner made four separate sightings during the period. On first pass, object appeared to approach the TB-29 at 9 o'clock with smoke trail; on second and third passes, object traveled 10 to 7 o'clock parallel and reciprocal to TB-29 with no smoke; on fourth pass, object appeared to split into two vertical formations and disappear stationary. Sighting durations 2-4 minutes each. Right scanner observed an oval, spherical, transparent dull grey object at 9 o'clock for 4-5 seconds. Weather clear with haze layer, visibility 60 miles. Conclusion: probably jet aircraft viewed at considerable distance, or possibly single-engine conventional aircraft under refraction conditions.

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