I think you guyes are missing Batz's jab at the BS history chanel statement obut 50cal's being bounced off the road to kill German Tanks.
"Experimentation with S-67 (1942) led to a design for a partially armor plated cupola, the so-called Kalotte (skull cap), over the bridge. The added armor was a countermeasure to the growing firepower of British escort craft encountered in the English channel. The S-100 class (1943) was designed from the start to incorporate the Kalotte and additional armament including a twin 2cm and a 3.7cm gun aft. A final variation, the type 700, was designed to carry two stern firing torpedo tubes in addition to the usual bow mounts and a 3.7cm gun in the bow turret."
Their is a Quote on the sight that above quote came from Whear it states the JFK was able to examine and E-Boat and said it was far supiour to the PT's Boats that the US had.
Above from Hear:
http://www.prinzeugen.com/SBOATIND.htm