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BEHAVIOR CLASSIFICATION

Transmedium (Air/Water) — UAP Cases

UAP observed transitioning between air and water environments without velocity reduction or structural effects.

DOCUMENTED CASES
4
YEAR RANGE
1967–2023
DoD? Unknown
TOP SECRET
DOD-004 · 2023-06-17

Transmedium Object — Pacific Naval Zone

Pacific Ocean (Naval Exercise Zone)

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.

TRANSMEDIUMRAPID ACCELERATIONHOVERING
STRONG
◈ MEDIA▶ VIDEO
OPEN DOSSIER →
DoD? Unknown
CONFIDENTIAL
DOD-018 · 1967-10-04

Shag Harbour — Transmedium Entry, Atlantic Canada

Shag Harbour, Nova Scotia, Canada

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.

TRANSMEDIUMRAPID ACCELERATIONFORMATION
PARTIAL
◈ MEDIA
OPEN DOSSIER →
DoD Orb / Sphere
UNCLASSIFIED
DOD-034 · 2013-04-25

Aguadilla Puerto Rico — Transmedium Entry/Exit

Aguadilla, Puerto Rico

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.

TRANSMEDIUMRAPID ACCELERATIONDISAPPEARED INSTANTLY
MODERATE
◈ MEDIA▶ VIDEO
OPEN DOSSIER →
DoD Orb / Sphere
SECRET
DOD-035 · 2019-07-15

USS Omaha — Transmedium Sphere Entry 2019

Pacific Ocean, off San Diego, California, USA

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.

TRANSMEDIUMHOVERING
COMPELLING
◈ MEDIA▶ VIDEO
OPEN DOSSIER →