Concur with snowman999. As a current instructor at Naval Submarine school I can backup snowman's claim. Also, as for the term angle off the bow...that is incorrect...we here at subscol have an impressive array of references...and believe it or not one of our more important ones I am going to share with you right now...we would appreciate it if you didn't share this with any Navies foreign.
www.google.com 
Don't get me wrong...we have bowditch and notice to mariners as well as some other instructions and what not...but before we crack open a book...most of the time I google it due to the fact some nice soul out there has taken the info and put it on the internet. Hope I didn't bust anyone's bubble by letting the reference out.
Anyhow, with a little bit of ingenuity I googled angle on the bow and came out with the following:
Angle on the bow -- Relative bearing of submarine from the target ship measured to starboard or port from the target ship's head from 0° to 180°. (ref:
http://www.history.navy.mil/library/online/ss-doc-4.htm )
Also looked through this link only because of all the different fleet boat terminology which was cool:
http://www.maritime.org/fleetsub/chap2.htm
This one is a good link that some guy converted over into SH3 terminology and images and posted on the subsim forum:
http://images.google.com/imgres?imgu...%3Den%26sa%3DN
This one has a great illustration...treat the arrows as your sub and all you have to determine is whether your seeing the port side or the starboard side of the ship so for the example given those are all starboard angle on the bows except for the 0 and 180 degrees:
http://www.sailingusa.info/current_deviation.htm
You could go on and on looking for stuff if you like.
I hope this helps you and good hunting and remember...if you got a 90 degree angle on the bow at 1000yards or less...let them fish fly and send them japs to the bottom.
