Nothing that I have seen, nor can we say there was any identifiable benefit they later gained.

We can also point out that there simply wasn't going to be much to see at the yards flown over. The Boston Yard was used for little more than destroyer building in 36-37. While the Fore River yard in Quincy had a total of 4 light and heavy cruisers building.

In New York you would have the first new battleship of the USN, the North Carolina, laid down only several months after the crash. While yards in Brooklyn were building a handful of cruisers.

Otherwise Newport News, Philly/Camden, and the West Coast were also focus points of what shipbuilding was going on.

While the generally poor state of German naval designs, especially of destroyers and battleships show that whatever clandestine design information they could have gathered either didn't stick, or was not used.