The story of the German Navy's attempts to interfere with D-Day from gunboats to E-Boats, which culminated in a 4-ship destroyer raid against the landing areas on 9 June 1944 and a big naval battle off the coast of Brittany.
Nice try Fritz. You have to admire the moxie, but yeah... futility. They might have been somewhat successful had they gone after the landing forces. At least thrown them into disorder.