AGUADILLA.
“At dusk on April 25, 2013, a Customs and Border Protection (CBP) DHC-8 (Dash-8) maritime surveillance aircraft, equipped with a Wescam MX-15D thermal imaging system, filmed a small unidentified object travelling at low altitude near Rafael Hernández Airport in Aguadilla, Puerto Rico.”
Roughly halfway through the recorded sequence, the object descends to the ocean surface and submerges briefly. After re-emerging, the object splits into two distinct objects which continue on a coordinated, parallel flight path. The object's apparent thermal and visual signatures throughout the footage are inconsistent with a balloon, bird or known aircraft, and its observed trans-medium behaviour (air–water–air) is the salient feature of the case.
The footage was leaked from CBP and obtained by the Scientific Coalition for Ufology (SCU), an independent volunteer research group of scientists and engineers. SCU's 2015 technical report, authored by Robert Powell, Morgan Beall, Douglas Johnson, Larry Cates and Richard O'Connor, performed photogrammetric analysis on the footage. They estimated the object's velocity in air at approximately 75–110 mph and its underwater transit at approximately 90 mph, and concluded that no known terrestrial object accounts for the combination of behaviours observed.
CBP's official position has been to neither confirm nor specifically discuss the footage. The case has subsequently been cited in mainstream UAP discussion, including by Lue Elizondo in the wake of the 2017 New York Times disclosure on the Pentagon AATIP program. The Aguadilla case is among a small number of high-quality, instrumented videos documenting trans-medium behaviour, alongside the GIMBAL, GOFAST, and FLIR1 Tic-Tac videos.