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It contains satellite imagery taken in November at China's new Huludao shipyard showing pressure hull sections for a large submarine being worked up.

"Clearly, the pressure hull gave way, right? And the question is, why would that give way?"

Coast Guard officials said they found several major pieces of the vessel in a debris field about 1,600 feet away from the bow of the Titanic, including the nose cone, the front end of the pressure hull and the back end of the pressure hull.

At the time, a Boeing executive said in a news release the aerospace company would work on the “development of the pressure hull of OceanGate’s next-generation manned submersible.”

Paul Hankins, a salvage expert for the Navy, said five major pieces of debris from the Titan were found, including the nose cone, which was outside of the pressure hull.