The US Coast Guard has made a grim discovery within the salvaged Titan wreckage from the Atlantic Ocean.

Marine safety experts now suspect that they have come across what could be the remains of individuals who were aboard the submersible.

This unsettling find was confirmed after the submersible was brought up from the ocean depths last week.

"Additional presumed human remains were carefully recovered from within Titan's debris and transported for analysis by US medical professionals," they shared in a statement.

Several pieces of debris, including the fully intact titanium end cap of the 22-foot vessel, were brought up from the seabed about 1,600 feet (488 meters) away from the Titanic, according to reports from the New York Post.

This salvage operation follows a prior recovery mission, and it's likely to be the final one. Officials will continue to examine evidence and conduct interviews with witnesses in preparation for a public inquiry into the incident.

The initial salvage mission took place in June and yielded photos and videos from the submersible. An expert, Jasper Graham-Jones, an associate professor in Mechanical & Marine Engineering at Plymouth University, analyzed this visual material before it was sent for further investigation.

According to Graham-Jones, the footage supports the theory that the vessel's carbon-fiber hull played a role in its catastrophic implosion.

Graham-Jones, speaking to Business Insider, emphasized the challenge of pinpointing the exact cause of the sub's implosion, describing it as "impossible." However, he suggested that the most likely scenario involved the sub succumbing to the extreme pressure of the ocean's depths.

On the other hand, an alternative theory proposes that the sub's small front viewport may have been the initial point of failure.

In 2018, David Lochridge, the former director of marine operations at OceanGate, alleged in court filings that the company had installed a front viewport capable of withstanding depths of only 4,200 feet (1,300 meters). This was significantly shallower than the intended maximum depth of 13,000 feet (4,000 meters).

Although the exact circumstances surrounding the change between 2018 and the 2023 mission remain unclear, it appears that the front viewport was compromised from the outset.

Furthermore, reports indicate that the sub had a success rate of only 14 percent. A company passenger waiver revealed that out of 90 dives, the sub reached the depth of the wreckage site on only 13 occasions.

OceanGate has since gone out of business, and its CEO, Stockton Rush, tragically lost his life in the implosion of the Titan submersible.