The Nimitz Encounter

The USS Nimitz carrier strike group was conducting training exercises approximately 100 miles off the coast of San Diego in early November 2004 when the USS Princeton, the strike group's Aegis cruiser, began tracking unidentified objects on its radar. The objects appeared at high altitude, dropped rapidly to approximately 80,000 feet, then descended to hover at around 20,000 feet. They had no radar transponder signal. They produced no infrared exhaust signature consistent with any known propulsion system. The Princeton tracked them intermittently for approximately two weeks before the strike group's commander ordered a visual intercept.

Commander David Fravor and his wingman were diverted from a training mission on November 14. The Princeton vectored them toward the last known position of one of the objects. What Fravor saw and reported has been described, confirmed, and officially acknowledged in congressional testimony and Department of Defense statements. The object he intercepted has not been explained.

Fravor descended toward the object and observed it visually from his F/A-18F. He described a white, oblong object approximately 40 feet long with no wings, no visible propulsion system, and no exhaust. The object was hovering above a roughly circular disturbance on the ocean surface below it, an area of churning white water approximately 50 to 100 feet in diameter. The cause of the surface disturbance was not identified.

As Fravor maneuvered toward the object, it began to mirror his movements. When he descended, it ascended. When he banked toward it, it shifted away. He attempted a more aggressive intercept, spiraling down toward it. The object accelerated away in under two seconds and was gone. Fravor subsequently described the acceleration as something he had never seen in his 18 years as a Navy fighter pilot. He said it disappeared like it was shot from a gun.

A second F/A-18F crew was dispatched to the area shortly after Fravor's intercept. Lieutenant Chad Underwood, the Weapons Systems Officer in the second aircraft, acquired the object on his Forward-Looking Infrared camera and captured approximately 90 seconds of video. The video was immediately classified on return to the ship. It remained classified for thirteen years.

The AN/SPY-1B Aegis radar system aboard the Princeton had been recently upgraded and recalibrated before the 2004 exercises. The radar operators who tracked the objects were therefore confident that the anomalous readings were not equipment artifacts. Senior Chief Kevin Day, the Princeton's operations specialist during the incident, has given interviews describing the radar picture over multiple days. The objects appeared consistently, dropped from high altitude to low altitude at speeds the system could not accurately calculate, and hovered before departing at velocities that also exceeded the system's tracking capability.

Day has described requesting authorization to intercept the objects earlier in the two-week tracking period and being told to stand down. The reasons for that decision have not been documented in any publicly available record. By the time the intercept was authorized on November 14, the objects had been tracked for approximately two weeks by a recently upgraded military radar system aboard a flagship of a carrier strike group.

Fravor and other personnel involved in the Nimitz incident were not debriefed in any formal sense after the event. Fravor has stated that a group of individuals he did not recognize came aboard the Princeton after the incident and removed data storage media from the ship's computers and radar systems. The removed media has not been publicly accounted for. The data it contained has not been released.

The FLIR video captured by Underwood was declassified and officially released by the Department of Defense in April 2020, alongside two other Navy UAP videos from separate incidents. The DoD confirmed the videos were authentic and stated that the objects in them remained unidentified. No further analysis of the Nimitz video has been officially released. The radar data from the Princeton, the ship logs from the incident period, and the data removed from the ship's systems remain classified or unaccounted for.

The object observed and tracked during the Nimitz incident demonstrated several flight characteristics that no known aircraft possesses. It descended from above 80,000 feet to approximately 20,000 feet at a rate that no known aircraft can achieve without structural failure. It hovered at 20,000 feet with no visible propulsion or lift mechanism. It accelerated from a hover to a speed beyond the tracking capability of an Aegis radar system in under two seconds, a rate of acceleration that would kill any human occupant and exceeds the structural limits of any known aircraft.

The object produced no infrared signature consistent with jet propulsion, rocket propulsion, or any other known thrust-generating mechanism. It produced no sonic boom despite apparently exceeding the speed of sound. It had no visible control surfaces. Its hull produced no observable aerodynamic effects during the portions of the encounter where it was moving at lower speeds.

These characteristics are documented in the accounts of multiple trained military observers, corroborated by radar data from a recently calibrated military system, and partially captured on a declassified FLIR video. The Department of Defense has confirmed the video is authentic and that the object is unidentified. No explanation consistent with known technology has been provided.

Multiple trained Navy personnel tracked, intercepted, and recorded an object that demonstrates flight characteristics no known aircraft possesses. The encounter was documented by radar, visual observation, and FLIR video. The video was classified for thirteen years and officially released in 2020. Data removed from the Princeton's systems after the incident has not been publicly accounted for. The object remains unidentified. No government agency has provided an explanation consistent with the documented evidence.