Treasure Trove: The Navy Won Big By Capturing This Nazi Submarine The intelligence materials taken from U-505 allowed Allied Naval Intelligence to read U-boat signals as fast as the Germans themselves. Here's What You Need to Remember: Fortunately, no word ever reached German intelligence. Gallery told all hands attached to the task group that nothing must be said about what happened during the cruise, and amazingly the men did as they were told. The public did not find out about U-505 until after the war. “Frenchy to Blue Jay—I have a possible sound contact,” squawked from USS Guadalcanal’s bridge intercom at 1110 hours. It meant that “Frenchy,” codename for the Destroyer Escort USS