Nighttime looks amazing! I don't know much about 1-bit graphics, but it's pretty impressive what you're able to do with basically 2 colors.
What's the book referenced above with the caption that says "original edition from 1941"?
Thank you! It’s called Taschenbuch der Kriegsflotte 1941/42. It was a book used on all warships and U-boats that summed up all the known ships from the main naval forces of both Allies and Axis. It contained detailed data about measurements , displacement, speed, armament, depth of keel, and silhouettes under various angles on bow. Captains used them to identify their targets and estimate speed, bearing, and other information required to come up with a torpedo solution.