The USS Trepang photos are among the most famous leaked military UAP documents, showing clear structural details.
Are these the most clear and credible photos of a UAP encounter ever captured by the military? In March 1971, the USS Trepang (SSN 674), a Sturgeon Class attack submarine, was on a routine mission between Iceland and Jan Mayen island when the crew spotted something anomalous through the periscope. This archive examines the leaked high-quality photographs of enormous, metallic-looking objects that appear to transition between the sky and the Arctic waters.
The incident, originally investigated by Alex Mistretta and shared via The Black Vault, features annotations that hint at a high-level security cover-up. With confirmation that Admiral Dean Reynolds Sackett was indeed aboard the submarine during this window, the “Trepang Photos” remain a cornerstone of maritime UAP (USO) research.
Official U.S. Navy Photos of Arctic UFOs Encounter LEAKED
A set of newly-released photos detail the U.S. Navy’s close encounter with an enormous UFO/USO.
The case was submitted to The Black Vault by researcher/investigator Alex Mistretta, who in turn got them from one of his anonymous sources in Europe. An interesting story is attached to these photos.
In March 1971, the USS Trepang, a Sturgeon Class attack submarine, was on a routine military and scientific mission at the edge of the Arctic Ocean.
The exact location of the sighting is unknown, but the submarine’s position was somewhere between Iceland and the Jan Mayen island in the Atlantic.
The unidentified object was first spotted through the periscope by an officer named John Kilika and the photos were taken by an unnamed officer. The quality of the photos is pretty good, which is uncommon in the field of ufology.


Mistretta’s source claimed there were a few annotations on the back of one of the photos: “Official photograph. Not to be released. CT.” and “Unauthorized Disclosure Subject. Security Certificate SSN 674. Criminal Sanction.”


While these inscriptions do not necessarily confirm the story, they make for an interesting addition.

SSN 674 was the official classification number given to the USS Trepang. Furthermore, the nuclear submarine was indeed in the area at that time.

The report also mentioned the presence of Admiral Dean Reynolds Sackett aboard the submarine, which can be verified here.

It is unclear whether the encounter involved two distinct UFOs or a single one capable of shape-shifting, but the photos appear to show two distinct objects, one shaped like a cylinder, the other like a triangle.

Unfortunately, more information regarding this interesting case is absent but we will present it if and when it becomes available.

By Locklip
Executive Summary
The report details a close encounter involving an unidentified flying/submerged object spotted by Officer John Kilika. Unlike typical blurry UFO footage, these periscope photos show distinct structural details of objects that defy conventional 1970s aircraft design.
Key Investigative Elements:
The Vessel: The USS Trepang was a nuclear-powered attack submarine specifically equipped for scientific and military operations in the Arctic.
The Objects: The photos depict at least two distinct shapes—one large and cylindrical/cigar-shaped, and another that appears triangular or pyramid-like.
Security Markings: One leaked photo allegedly bore the inscription: “Official photograph. Not to be released. CT. Unauthorized Disclosure Subject. Security Certificate SSN 674. Criminal Sanction.”
The Shape-Shifting Hypothesis: Some researchers argue the photos may actually represent a single craft capable of structural transformation or “shape-shifting” as it maneuvers near the ocean surface.
“The quality of the photos is pretty good, which is uncommon in the field of ufology… and it was plain that the unidentified object had an unknown type of propulsion.”