I was fascinated by the [operation] of a U-boat ... where every single man was an indispensable part of the whole. Every submariner, I am sure, has experienced in his heart [the joy of] the task entrusted to him [and] felt as rich as a king.
Karl DonitzOur losses have reached an intolerable level. The enemy air force played a decisive role in inflicting these high losses.
Karl DonitzOnly ... from personal experience [can a man] take the necessary measures without a preliminary process of trial and error.
Karl DonitzWith the new weapons like the atom bomb, Russia would have it, too, and use it first. It is a very difficult world. But that trouble is imminent is obvious.
Karl Donitz