One of the unique capabilities of the U.S. Navy is it's ability to replenish supplies while underway in almost any type of weather. The photo below shows three ships, the USS Oriskany, the oiler USS Passumpsic, and the destroyer USS Morton. Because of the quality of the image, it is almost impossible to see the many hoses extending between the ships as the Passumpsic refuels both the Oriskany and the Morton.
However, things are not always that calm... as these pictures of the USS Waldron show.