The Ursa Major went down in the Mediterranean on December 23 last year after a series of blasts on its starboard side, roughly 60 miles from Spanish waters, according to a CNN investigation citing Spanish officials and sources familiar with the probe.
The Jones Act, formally known as the Merchant Marine Act of 1920, was passed by Congress to rebuild the United States's shipping industry after German U-boats devastated the country's merchant fleet during World War I. At its core, the act requires that any ship transporting goods or passengers between US ports must be built in the US, owned by US citizens and crewed primarily by Americans.