I'll tell you one thing, when the hatch is closed 
and you can't hardly hear a thing from above, it gets your attention.  But, 
when you see the water close over top of you and it continually gets darker as 
your drifting downward, it really sets you on edge, even though you know it's 
not THAT deep.  ;-)  The more I dove it, the more I calmed down.  
The first time, it was years of imagination coming to REALITY.  
:-)
 
All went well.  We dove and returned several 
times.  
I'll have a full account of the day posted 
soon.
 
Thanks for all the help from the PSUBS 
community.
Dan H.