What appeared to be pieces of the submarine were uploaded to the Horizon Arctic, a Canadian ship. It’s unclear what parts of the Titan were recovered, although one particularly large piece could be seen with several large cables attached to it.

The Canadian ship Horizon Arctic was carrying a remotely operated vehicle, or ROV, to search for parts of the submersible on the ocean floor near the Titanic wreck. Pelagic Research Services, a company with offices in Massachusetts and New York that owns the ROV, said Wednesday that it has completed offshore operations.

The debris will be transported by the Marine Board of Investigation (MBI) aboard a US Coast Guard ship to a port in the United States where it will be analyzed and tested.

The Associated Press contributed.