Aarnoman - am I to take it that you're a native speaker? If so just as a matter of interest I'd love to find out what some of the other speaking bits are, like for when the guns are being manned, not enough crew in the engine room, plot a new course, are etc. I'm learning German but can't really work out what these are saying.
As for the commands, as has been pointed out orders like 'all ahead full' by definition tend to be shouted in the heat of battle so there's some variance. I've noticed DBSM has some discrepancies. This is what it should be in the textbooks:
1/5 - Kleine Fahrt
2/5 - Langsame Fahrt
3/5 - Halbe Fahrt (think this is Grosse Kraft in DBSM)
4/5 - Grosse Kraft (Volle?)
5/5 - Äusserste Kraft (Wahnsinning)
Have a look at
this.
Preceded usually by "Beide/Backbord/Steuerbord Maschine" and followed by 'Voraus/Zurück" as appropriate. Personally I'd like to see 1,2,3 and 4/5 with the proper speeds spoken as above. I like the sound for silent speed, where they whisper it and then go to 90 rpm - I think ripped straight out of Das Boot.
But perhaps a shouted "give her everything she's got, chief!" for 5/5 speed. Glad someone else noticed this.