Thank you for your insight Mittelwächter. On that note, do you know any place listing either slang and/or official commands? I've been searching the web the past couple of days, and the most I could find was this on diving:
http://www.uboatarchive.net/DivingRegulations.htm
You wouldn't happen to know of any other such documents? And please share some of the slang commonly used for commands regarding speed/diving/etc, or direct me to websites/articles.
Thank you again for your help.