The recovery vessel Horizon Arctic has already delivered all the wreckage it managed to recover from the wreckage of the Titan submersible on the Atlantic seabed.

As demonstrated by the amount of material that washed up on shore, the ship’s deep-sea robot was able to salvage key components.

This could help investigators find the cause of the Titan’s catastrophic implosion 11 days ago, which killed five people.

Wharf workers in St John’s, Newfoundland attempted to conceal the fragments, but some pieces were still clearly identifiable.

One of the most important parts is the titanium and carbon fiber front cover of the cylinder-shaped submarine.

Resembling a metal donut, the hole in the middle is where the outer viewing window used to be.

The crane arm went through the hole. It is unclear where the plexiglass window is now. Experts wondered about the strength of the window and its ability to withstand the pressure at 4 km depth. But it is not possible to draw a conclusion just by looking at the pictures.

Also brought ashore were what appeared to be the titanium bridles – the metal rings glued to each end of the Titan’s cylindrical carbon fiber hull. The edges would come into contact with the end caps.

The flanges and their connection to the carbon fiber will be the focus of the investigation by US and Canadian authorities.

“I think the key things to look at are the interface between the acrylic window and the titanium, the hemispherical domes or covers; and the area where the carbon fiber would have been bonded to the titanium flanges,” Blair Thornton said. , professor at the University of Southampton, UK.

“You can see…both components have been recovered, which is the best we can hope to do to further the investigations,” he told the BBC.

Several bags of debris were loaded onto trucks. We have no idea what they contained. Could there be pieces of the carbon fiber shell itself?

If so, investigators will want to examine them for any evidence that the carbon layers are beginning to separate – a process known as delamination – particularly at the point where they join the flanges. The carbon fiber layers can start to separate under extreme conditions.

One of the biggest things to come off was the rear gear compartment. Although covered with a pointed tail cone when diving, it is an open cage. It appears from the photos that the cone suffered extensive damage when it was torn from the submarine.

Notice the long protruding stem. This is an antenna that would normally connect to the Iridium satellite phone network when the submarine is on the sea surface.

The antenna would have been independently powered and the fact that no messages were received by this system after Titan began its dive was a strong indication during the search phase that the vehicle never returned to the ground. surface.

The long metal struts are what remains of the landing structure, which Titan used to place on a flat surface, such as in the workshop or on the launch barge. The recovered sections would have been attached to titanium rings at the ends.

The large white panels seen on the pier were part of the outer skin or fairing of the submarine. They were used to cover the wires and tubes that ran along the outside of the carbon fiber shell.

Some said these panels would be the hull fragments themselves, but the carbon fiber pressure vessel parts would be black, thick and stiff. These white panels, on the other hand, bent when placed on the truck.

What we didn’t see coming out of the ship were the containers that could have been used to move human remains. The US Coast Guard says it may have this material.