Incident: 18 January 1957. Air intelligence report: 19 January 1957. PURSUE release: 23 October 2026. UKPX source review: 6 November 2026.
On a night flight over Saudi Arabia, the crew of a US Air Force B-52 reported an unexpected return on its gunnery radar. It remained near the 6,000-yard marker for approximately five to seven minutes, then disappeared from the display as the bomber banked left. The surviving report places the aircraft at roughly 27° north, 47° east and identifies the mission as Operation Powerflight.
The record is short, but it preserves a useful distinction between what appeared on the scope and what the crew could establish about it. The return was described as an unidentified aircraft. There is no accompanying visual description of a craft, photograph of the target, or recorded measurement of its speed. The report’s stated significance was that a return appeared where no aircraft had been expected.
The crew’s account
Air Intelligence Information Report IR-1-57 was prepared by Captain Alva Smith and issued from the 22d Bombardment Wing (M), March Air Force Base, California. It identifies B-52 aircraft number 394, from Castle Air Force Base, with the call sign Runner 11. The narrative places it within the 328th Bombardment Squadron and 93d Bombardment Wing (H). Those organisational and aircraft details identify the reporting platform; they do not identify the unexplained return.
The contact occurred shortly before the bomber was due to rendezvous with a tanker. The aircraft’s A-3A gunnery scope showed the unexpected return near its centre at the 6,000-yard marker. A second B-52 also produced a return, enabling the crew to compare their displayed sizes. The unidentified return was smaller on the scope. That is a comparison of radar presentation, not a measured physical diameter of another aircraft.
The report gives the B-52’s altitude as 39,000 feet and its speed as 642 knots. The diagram labels that speed as true airspeed. These figures belong to the bomber. They must not be transferred to the unidentified return as evidence that it travelled at that speed or height.
The turn and the disappearing return
After the reported five-to-seven-minute contact, the B-52 banked left. The unidentified return disappeared off the scope to the left. The writer explicitly allowed that the bomber’s own change of direction might have caused the disappearance. The account also described the apparent departure as being towards the Baghdad Flight Identification Region.
These statements leave more than one element unresolved: whether the return represented an aircraft, what produced it, and how much of its apparent movement resulted from the observer aircraft’s manoeuvre and the display geometry. The released report does not supply a later identification or a separate tracking record that settles those questions. A disappearance from this scope is not, on its own, a measured acceleration or proof that an object vanished physically.
A diagram with a detail worth preserving
The second page illustrates the scope presentation. It draws the unidentified blip near 6,000 yards and labels a separate blip as the other B-52 in the formation. It is an explanatory diagram within an intelligence report, rather than a photograph or raw recording of the radar display.
There is a small discrepancy inside the record. The narrative places the second B-52’s return at the 5,000-yard marker, whereas the diagram draws that labelled return near 3,000 yards. UKPX preserves that difference rather than silently choosing one value. It does not change the reported 6,000-yard marker for the unidentified return, but it limits how confidently the illustration can be read as a precise reconstruction of every range.
Five PDF pages, one two-page report
The released PDF has five scanned pages. Its first two pages contain the report and diagram; the next two repeat that pair, and the last is a reversed copy of the diagram. These are not five separate sightings, independent reports or additional observing crews. The two-page report is the substantive account.
The modern PURSUE notes describe the material as a raw Air Intelligence Information Report and summarise the five-to-seven-minute radar contact. The original’s approximate aircraft coordinates, aircraft motion and internal diagram discrepancy provide detail beyond that catalogue summary. Neither the release date nor the number of scanned copies should be mistaken for the incident date or the amount of independent corroboration.
Original document and map reference
The source is DOW-UAP-D155, Air Intelligence Information Report, Saudi Arabia, 1957, published in PURSUE Release 07 on 23 October 2026. UKPX read all five scanned pages and checked the official catalogue notes on 6 November 2026.
The PDF and diagram are US Air Force government works, public domain in the United States. UKPX retains the original PDF and identifies the diagram as a document illustration.
The map pin uses the approximate B-52 position stated in the original report: 27°N, 47°E. It is a broad airborne contact-area reference in Saudi Arabia, not the exact position of the unidentified return, a ground encounter or a plotted flight path. The source supplies no finer coordinate precision. Browse UFO / UAP / USO or return to Cases.