So, this question doesn't belong here, but I can't think of a more appropriate place to ask it. I've been surfing through a sea of 'White Power' and pro-Nazi sites since hate seems to run a close second to sex on the internet and any one asking about things German or WWII in English must be a hater... or so it seems.
I am reading Das Boot, in English since my German is worse than rusty, and I've encountered the phrase "Heil UA!" well, I know what heil means but the UA completely eludes me and, as I said, the internet is not being helpful.