Ha! Interested in Jon E's comments about how a FCE isolates the skipper from the elements.

We saw this private sub in Greenport harbor a few years back. Note the jet-ski "trailer" (instead of towing a dinghy). The boat name is Deep Quest. Judging from the trailer and cockpit enclosure (with radar dome mounted on top) I would guess they don't take it very deep anymore.

I searched for the boat name and found a few links about it
http://www.ussdeepquest.kk5.org/

http://www.tbnweekly.com/content_articles/082406_bee-01.txt

http://www.danshamptons.com/content/danspapers/issue09_2007/23.html