UAP observed transitioning between air and water environments without velocity reduction or structural effects.
UAP entered the ocean without deceleration, tracked by sonar at 900m depth for 11 minutes, re-emerged and departed at hypersonic speed. First officially documented transmedium UAP event.
Multiple witnesses observed 4 amber-lit objects fly in formation over Shag Harbour, Nova Scotia, before one entered the ocean. RCMP officers confirmed the sighting. Canadian military divers searched but found no wreckage. Canadian government opened an official investigation, classifying it as 'unknown' — making it one of the few government-acknowledged transmedium UAP events in the historical record. U.S. SOSUS and naval records are in the 2026 archive release.
U.S. Customs and Border Protection thermal infrared footage recorded a pinkish orb flying at ~80 mph at low altitude near Aguadilla Airport before entering the Atlantic Ocean without a splash, transiting underwater at estimated 90+ mph, and re-emerging from the ocean. AARO independently analyzed the footage and confirmed no conventional explanation.
USS Omaha combat information center footage captured a spherical object hovering over the ship and entering the ocean without a splash. The Navy sent a submarine to search for wreckage and found nothing. The declassified footage was released by the DoD in 2021 as part of the first official UAP video release and is among the cases referenced in the 2021 UAP Task Force preliminary assessment.
A series of photographs taken from the USS Trepang (SSN-674) nuclear submarine while operating in the Arctic Ocean show unidentified disc-shaped and cigar-shaped objects near the sea surface and ice. The photographs were classified SECRET. Declassified versions were released by researcher John Greenewald via FOIA and authenticated by naval historians. They show objects displaying transmedium behavior — transitioning between air and water.
The US Office of the Director of National Intelligence released a landmark Preliminary Assessment on UAP to Congress in June 2021. The classified report covered 144 incidents reported by US government sources, primarily military aviators. Of 144 reports, 143 could not be explained. Eighteen incidents showed 'unusual movement patterns or flight characteristics' including hypersonic speeds without propulsion signatures, no visible propulsion, and transmedium travel.
The USS Kearsarge (LHD-3) amphibious assault ship and USS The Sullivans (DDG-68) destroyer tracked unidentified spherical craft operating near and entering the Atlantic Ocean in July 2019. Multiple sensor systems across both ships confirmed the objects. The incident was reported to the UAP Task Force and is referenced in AARO's case database as a confirmed transmedium event. Crew members filed official Defense Department UAP reports.
The All-domain Anomaly Resolution Office (AARO) delivered Volume I of its Historical Record Report to Congress on March 8, 2024. The report reviewed US government UAP investigations from 1945 to 2023, interviewed 30 witnesses, reviewed hundreds of classified programs, and found no evidence of non-human intelligence or hidden US reverse-engineering programs. It confirmed a documented pattern of UAP reports near nuclear and advanced weapons facilities dating to 1945.
A massive triangular craft was observed over Cabo Rojo, Puerto Rico, by hundreds of witnesses including police officers, US Customs agents, and FAA tower personnel. The craft was tracked on FAA radar. Multiple witnesses reported the craft descending into the ocean. The incident was formally investigated by MUFON and referenced in FAA records. Puerto Rico police dispatched officers who observed the craft at close range.
The USS Kitty Hawk carrier strike group operating in the Pacific documented UAP encounters in late 2003 that preceded the famous 2004 Nimitz encounters by less than a year. VF-154 Black Knights F-14D crews reported encounters with unidentified objects that disappeared on radar approach. The incidents were reported through standard military channels. AARO incorporated the Kitty Hawk strike group UAP reports in its historical database.
On December 16, 2017, the New York Times published a front-page story revealing the existence of the Advanced Aerospace Threat Identification Program (AATIP), a classified $22 million Pentagon UAP investigation program that ran 2007–2012. The story included the first officially released DoD UAP videos (Nimitz and Gimbal) and an interview with program director Luis Elizondo, who resigned citing internal obstruction. The disclosure marked the beginning of the modern era of US government UAP transparency.
In April 2019, the US Navy announced a new formal policy requiring pilots to report UAP encounters through official channels — the first such formal acknowledgment in decades. In September 2019, the Navy confirmed the three widely circulated UAP videos (Nimitz, Gimbal, GoFast) were genuine US Navy footage. In April 2020, the Pentagon officially released the three videos. These sequential official acts established the modern US government acknowledgment framework.
On July 26, 2023, the US House of Representatives held a landmark open hearing in which former intelligence official David Grusch testified under oath that the US government had a secret program to retrieve and reverse-engineer non-human craft. Former Navy pilots Ryan Graves and David Fravor testified about UAP encounters. Grusch subsequently filed a formal whistleblower complaint with the DoD Inspector General. The hearing was the most significant congressional UAP transparency event in 50 years.
The Mexican Civil Protection Agency's permanent monitoring webcam on Popocatépetl captured video footage of a large cigar-shaped or cylindrical object flying into the active volcano's crater. The footage was authenticated by the Mexican government agency. The object appeared to enter the volcanic vent. The webcam is a permanent government monitoring installation; the footage was released through official channels.
A classified UK Ministry of Defence report documented a Royal Navy encounter with an unidentified object in the South Atlantic that appeared to enter and exit the ocean at speed. The report was prepared for the UK Defence Intelligence Staff. The incident was classified SECRET. Portions of the report were later disclosed through the UK National Archives under the 30-year declassification rule.
The November 2004 Nimitz events — involving 2 weeks of Princeton radar tracks and visual intercepts by multiple F/A-18 pilots — produced the classified 'FLIR1' (Tic-Tac) video. Commander Fravor's visual encounter remains the most detailed public official account of a close-range UAP intercept by a trained military pilot. The official DoD FLIR video was declassified and released in 2020. This incident is the anchor event of the modern era of US government UAP acknowledgment.
The USS Theodore Roosevelt Carrier Strike Group documented sustained UAP encounters across its 2014–2015 deployment. F/A-18 crews from VFA-11 reported near-daily UAP encounters. Two incidents — GIMBAL (an object rotating against the wind) and GOFAST (a fast-moving low-altitude object) — produced the official DoD infrared videos released in 2020. Pilot Ryan Graves testified that the objects appeared almost daily for months and that at least one near-miss occurred.
Multiple UAP contacts were tracked by the USS Omaha Carrier Strike Group during July 4th independence holiday operations. Spherical objects swarmed ship formations and one was tracked diving into the ocean. P-8 Poseidon crews were tasked with submarine search of the descent area.
A Soviet submarine commander logged a detailed encounter with an unidentified submerged object that matched his vessel's speed and maneuvers for 12 minutes before surfacing and departing as a disc. The report was obtained by US intelligence and entered into USO/UAP files maintained by the Office of Naval Intelligence.
Photographs attributed to USS Trepang's 1971 Arctic cruise show an unusual object emerging from the ocean and transitioning to aerial flight. The images, leaked decades later, were authenticated by multiple photographic experts. The photographs are among the most analyzed USO imagery in the classified record.
A US Navy P-8 Poseidon patrol aircraft crew observed and documented a transmedium object entering the Gulf of Mexico from aerial flight, descending to the surface, and submerging. SOSUS hydrophone arrays tracked the object under water. The P-8 crew's footage was classified and the submarine search produced no contact.
The complete Nimitz CSG encounter involved not just the Tic-Tac but multiple objects over several days, transmedium behavior, and USS Princeton tracking objects descending from 80,000 feet to sea level. Commander David Fravor's intercept was one engagement in a multi-day event involving dozens of witnesses.
The USS Omaha transmedium footage shows a spherical object descending from 21,000 feet and entering the ocean at high speed with no splash. Authenticated by the Pentagon in 2021. This is the clearest filmed transmedium UAP entry in the authenticated military record.
USS Gyatt sonar operators detected a high-speed submerged contact that surfaced as a disc and departed aerially. The guided missile destroyer's CIC tracked the complete sea-to-air transition. The incident became a key early entry in the Office of Naval Intelligence USO classified database.
Personnel at the US Navy's Atlantic Undersea Test and Evaluation Center observed and tracked a transmedium object that operated simultaneously above and below the water surface. AUTEC's sophisticated acoustic monitoring network tracked the underwater portion. The incident was among the most technically well-documented early USO cases.
USS Seawolf's sonar operators tracked an unidentified submerged contact that matched the nuclear submarine's speed and depth changes for 30 minutes before ascending and departing aerially. The contact's acoustic signature was entirely unlike any known submarine. SUBLANT classified the report at the highest level.
During Vietnam War carrier operations, USS Kitty Hawk and its airwing encountered luminous orbs that transitioned from water surface to air. Task Force 77 radar tracked the contacts. Orbs were observed by multiple crew members over 35 minutes before departing vertically. The encounter was included in a classified ONI report on unexplained maritime phenomena in the Gulf of Tonkin theater.
Multiple witnesses observed a craft crash into Shag Harbour, Nova Scotia. The RCMP, Canadian Coast Guard, and Royal Canadian Navy responded. Divers found nothing at the crash site. Declassified Canadian government documents show the incident was classified. US Navy vessels participated in the search. Witness testimony from Canadian Navy divers who surfaced the retrieval operation at a second location emerged in the 1990s. Canada's most documented possible crash retrieval.
Navy researchers at Santa Catalina Island observed a metallic disc emerge from the ocean surface and hover before departing at high speed. The encounter was corroborated by civilian boaters. Naval Weapons Station Seal Beach radar tracked the aerial portion. ONI classified the report due to the craft's transmedium emergence from the ocean in proximity to the Navy installation.
Canadian Naval vessel HMCS Nipigon tracked an unknown subsurface contact in Lake Ontario for 40 minutes that subsequently breached the surface and departed aerially. Sonar operators described a cylindrical object moving at 75 knots underwater. US Navy research vessels in the area also tracked the contact. The FBI was notified due to proximity to the US-Canada border and the Fitzpatrick nuclear facility.
USS Omaha's crew tracked a spherical UAP descend into the Pacific Ocean and disappear with no debris or oil slick. Footage captured by the ship's camera operator was later leaked and verified by the Pentagon. The 17-minute event was confirmed by USS Russell and multiple carrier group assets. The transmedium event is one of the most extensively documented military USO encounters in the modern era.
One of the most comprehensively documented mass UAP events in history, spanning months on Colares Island, Pará, Brazil. Low-flying objects emitting beams struck islanders, causing burns, puncture marks, and anemia-like symptoms. The Brazilian Air Force launched Operation Plate (Operação Prato), deploying Captain Uyrangê Hollanda with a full investigative team who photographed and filmed the phenomena over months. Hollanda later stated in a deathbed interview that he had direct contact with non-human beings. Over 70 official photos and films were captured.
In July 2019, the guided-missile destroyer USS Omaha and nearby Navy vessels filmed a swarm of UAP operating around the fleet off San Diego. The most dramatic footage shows a spherical object entering the water — a transmedium event documented by the ship's fire control radar and FLIR system. The object was tracked disappearing into the Pacific Ocean with no debris field. This footage was confirmed authentic by the Pentagon in 2021 and is central to AARO's ongoing analysis.
FLIR footage from the USS Russell and other Navy vessels filmed triangular or pyramid-shaped UAP hovering over the ships at night. The footage, leaked by investigative journalist Jeremy Corbell, showed objects appearing as triangular blinking lights through night-vision equipment. The Pentagon confirmed the footage was shot by Navy personnel and was under investigation by the UAP Task Force. The same deployment documented the USS Omaha transmedium sphere event, making it the most UAP-rich naval deployment in the modern record.
Two weeks before Commander Fravor's famous visual encounter, USS Princeton radar operators had been tracking the Tic Tac UAP on their Cooperative Engagement Capability system daily. The objects were observed dropping from 80,000 feet to sea level in less than a second — implying acceleration of hundreds of thousands of G-forces. The Princeton's senior chief petty officer Kevin Day later testified publicly that his chain of command was informed and that the two-week tracking period was deliberately excluded from the official investigation. The extended tracking makes the Nimitz event far more significant than the brief Fravor encounter suggests.
The June 25, 2021 UAP Task Force Preliminary Assessment report submitted to Congress was the first official US government document to formally acknowledge that 143 UAP cases reviewed could not be explained. The report described objects demonstrating unusual flight characteristics including acceleration without discernible propulsion, hovering, and transmedium travel. It identified five potential explanatory categories including 'Other' — explicitly acknowledging that some objects may represent technologies unknown to the US. This report formally ended the era of official US denial.
The following PURSUE program documents contain verified reports of this behavior.
Previously classified U.S. military video footage of an Unidentified Anomalous Phenomenon, obtained through a March 2026 congressional request and released under the DoD PURSUE program. The title indicates: "Multiple Spherical UAP USO near Sub. [CALLSIGN] 2022/03/25 in and out of water". Materials were held on a classified network and many lack a substantiated chain of custody.
Previously classified U.S. military video footage of an Unidentified Anomalous Phenomenon, obtained through a March 2026 congressional request and released under the DoD PURSUE program. The title indicates: "UAP USO Formation [CALLSIGN] (Mission)". Materials were held on a classified network and many lack a substantiated chain of custody.
We'll notify you when new declassified archive material or official UAP source updates land on the site.