A sub question

["Morrisson, Richard D" <Richard.Morrisson@PSS.Boeing.com>]

I have a specific question regarding subs which hopefully someone can
answer or direct me to the answer of.

What are the "freeboard" requirements or recommendations for a personal
sub?  I have some idea of what it "should" be but am interested in what
the ABS or other sanctioning organizations might have to say.  If anyone
has invested the $75 for the ABS book (I have not, yet!) please let me
know if it covers this.

The reason I ask is I am exploring a somewhat different design for a one
person sub which involves vertical (standing upright) ascents/descents
and a transition to horizontal (prone) once at depth (to a "Deep Flight"
style craft).  My idea is to minimize the cost of the structure and to
maximize streamlining at the same time.

Thanks for your help.