Project 10073 Record Card — Waldoboro, Maine, 10 September 1956

This document consists of a Project 10073 record card and associated teletype correspondence regarding an unidentified aerial phenomenon sighting in Waldoboro, Maine, on 10 September 1956. The primary witness was a United States Navy Petty Officer 1st Class assigned to VP 10, described by investigators as an alert and experienced airman well-acquainted with both civilian and military aircraft. The witness reported observing a single, silver-gray, cigar-shaped object for approximately four minutes. The object appeared to be the size of a quarter held at arm's length and featured a diffused light similar to an aircraft landing light, though it lacked a beam. The object was initially sighted in the south-southeast at a 45-degree angle of elevation. It exhibited unusual flight behavior, including hovering and performing two 90-degree turns followed by an approximately 180-degree turn before returning to a south-southeast heading and disappearing over a hill. The witness explicitly stated that the object's flight characteristics differed from those of normal aircraft. The investigation was conducted by 1st Lt Donald L Marksbury of the Air Intelligence Office. In his report, Lt Marksbury noted that he had interviewed the witness at length and that the witness remained convinced the object was not a conventional aircraft. Despite the witness's experience and the investigator's inability to identify the object, the official conclusion recorded on the project card is simply 'Probable a/c'. The documentation includes standard military teletype headers, routing information to various commands including the 32nd Air Division and the Air Technical Intelligence Center, and a summary of weather conditions, which were reported as good.