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.
At the end of 1916, U-boats operating under some restrictions were sinking about a third of a million tons of Allied shipping per month. By the time the unrestricted campaign recommenced on 1 February 1917, the Germans could deploy over 110 submarines in all theatres, and the new types were technically superior to earlier models.