1 Understanding a Photosynthesis Diagram Photosynthesis is a process by which plants convert the radiant energy of sunlight into chemical energy that can be used by themselves to power their lives. 2  A diagram of photâ¦.
U-Boat Crew. The crew numbers aboard a U-boat varied greatly between different U-boat types and the mission it was undertaking. A Type II U-boat comprised of 25 officers and seamen, while a Type VII housed approximately 45. A Type IX had about 50 and Type XXI had a 57 man crew. Sometimes U-boats carried specialist crews on special missions, such as scientists, spies or commandos.
Best Answer: A nuclear submarine can stay underwater indefinitely, it produces it's own air and fresh water. The only constraint on the time it can stay submerged is food for the crew.Once the food runs out it has to be re-supplied.A normal patrol can be between 3 and 6 weeks but could be extended to 12 weeks if necessary and if they had enough food for the crew, probably much longer.S Nuclear Submarines can stay submerged for only as long as they have food. That is what is the limiting factor. I have gotten underway walking on food. Large #10 can stacked 2 high throughout the forward compartment and that is just for starters. Needless to say, it can be a really long time!