The humpback whale, stuck for weeks in shallow waters off Germany, was towed to the North Sea in a barge. The story captivated the country.

Liquefied natural gas transit has been effectively halted. A ship managed by Abu Dhabi’s state oil company managed to cross, said Kpler, a maritime data firm.

The Nord, a 464-foot vessel, appears to be tied to Aleksei A. Mordashov, a Russian steel mogul who is under American and European sanctions.