RB-47 Electronic and Visual Encounter
A USAF RB-47H electronic reconnaissance aircraft with a crew of six tracks an unidentified object for over 700 miles across the southern United States. The object is detected simultaneously by the crew visually, by the aircraft's electronic intelligence sensors, and by ground-based radar stations — a rare triple-sensor confirmation.
Background
On July 17, 1957, a Boeing RB-47H Stratojet from the 55th Strategic Reconnaissance Wing encountered an unidentified object during an ELINT training mission over the Gulf of Mexico and southern United States, featuring electronic, visual, and radar corroboration over 90 minutes and more than 1,100 kilometres.
The Incident
The RB-47 departed from Forbes Air Force Base in Kansas with a crew of six: pilot, co-pilot, navigator, and three electronic warfare officers operating specialized ELINT equipment to detect radar emissions.
During the return leg, the number two electronic warfare officer detected a strong, pulsing signal at a frequency consistent with an airborne radar source, unlike any known system.
The signal originated from an object maneuvering relative to the aircraft—at times ahead, behind, and shifting position almost instantaneously.
Visual and Radar Confirmation
As the RB-47 crossed the Gulf Coast into Texas, cockpit crew gained visual contact with an intensely luminous object correlating with the tracked electronic emissions.
Ground-based radar sites registered an unknown return in the same location.
This triple-sensor corroboration—visual from aircrew, passive electronic from onboard sensors, and active radar from ground—persisted for approximately ninety minutes across Texas into Oklahoma.
Key Observations
- At one point, the object stopped abruptly and hovered while the RB-47 overflew its position, then reappeared in a different quadrant.
- The object vanished simultaneously from all three detection modes near Oklahoma City.
Investigation
The University of Colorado's Condon Committee, established by the Air Force for independent scientific review of UFO cases, examined the incident in detail.
The committee's final Condon Report of 1969 acknowledged the case remained unexplained, one of few such designations in the skeptical report.
Significance
The RB-47 encounter of 1957 is widely regarded as one of the most evidentially robust UAP cases on record, owing to the rare convergence of three independent sensor modalities confirming the same anomalous object over an extended duration and distance. Its acknowledgment as unexplained by the Condon Committee — a body generally disposed toward conventional explanations — lends the case particular weight in the scientific assessment of UAP phenomena.