Sighting Report — Grisslehamn, Sweden, July 25, 1946

On August 7, 1946, Gustaf Winberg wrote to Major Nils Ahlgren of the Swedish Defence Staff's Air Defence Department to report a sighting of two unidentified aerial objects. Winberg states that on July 25, 1946, between 13:30 and 14:00, while vacationing in Grisslehamn, he was rowing to Loskär with his wife and daughter. During this time, he observed two objects, which he describes as 'air torpedoes,' passing between the Grisslehamn mainland and the skerry of Loskär. The objects were traveling in a northeasterly direction at an altitude of approximately 10 meters above the water. Winberg estimates their speed at 100 km/h and notes that they emitted a strong humming sound similar to a small aircraft engine. No smoke was observed, and the objects were light gray in color. He noted that the two objects moved parallel to one another, suggesting they might have been connected. The objects eventually disappeared behind a headland. Winberg mentions that he and his family discussed the appearance of the objects without conferring with one another beforehand, reaching a consensus on the general shape of the bodies, though they remained uncertain about the appearance and position of the wings. He included a simple sketch with his letter and requested confirmation that his report had been received, noting that he had not shared this information with any newspapers or other authorities.