Incident #159 Sighting Report — Worthington, Ohio, 30 July 1948

This document details the investigation of Incident #159, a sighting of an unidentified airborne object reported by a male civilian in Worthington, Ohio, on 30 July 1948. The witness reported observing a cylindrical, silver object with a steady glow, moving very slowly in a southwest direction at an estimated altitude of 3,000 feet for approximately 15 minutes. The witness stated there were no visible wings, tail surfaces, or engine noises. Major H.M. Campbell of the U.S. Air Force conducted an interview with the witness, who confirmed that his wife also observed the object. The investigation included a follow-up inquiry to the Douglas Leigh Sky Advertising Corporation regarding the operation of lighter-than-air craft in the Columbus, Ohio, area during the time of the sighting. The official conclusion reached by the investigator was that the object was likely an advertising blimp, noting that the time of the observation, just after sunset, would have given such an object the appearance described. The document also includes administrative correspondence from the Air Materiel Command regarding Project SIGN, which was responsible for the collection and investigation of such reports, and mentions the coordination between the Air Force and the Air Weather Service to eliminate balloon sightings from the project's data.