I got a tad distracted, basically I got tired of both Lake and Holland designed boats and needed a break. I was also clearing out a bunch of hobby stuff and ran into a couple old models. That's a disaster as back in the mid 1990's I was building RC subs. Now I've an RC Type VII U-Boat in the works (you'll probably hear the hull collapsing sounds coming from my checking account shortly as it approaches crush depth).
Germany, Type VIIC Class (1938-1945) This drawing should be considered "typical" for 1940 or so.
The problem with drawing Type VII C's is that 568 were built! This doesn't include the A, B, D, and F variants. No other submarine in history was built in such vast numbers. Many manufacturers were used, uncountable modifications were made, and basically no two subs remained identical. Vent patterns were altered by series design changes, manufacturing needs, and even by the individual subs' captains. Conning towers evolved over time, etc., etc. to reflect wartime requirements. I've a LOT of reference material on these boats and I've several additional drawings in the works.
Where possible I've tried to adhere to SB Standards...unless the Standards impact the readability of the line-work. Enjoy!
CraigH