While the pics are nifty and whatnot it is still difficult to really tell what the inside of the boat is shaped like. Jenny finally found a copy of the layout for a mariner.
click on the pic for a bigger view:
The one thing this doesn't explain is that just below the "R" in "Refrig." there is a thick blob of ink. That is actually the ladder that goes straight up and through a hatch leading to the flybridge. The flybridge is pretty huge and has room for seating of like 6 people or so. That'll be sweet on nice days... and even on crappy days there is canvas to go around the flybridge so we can still enjoy it.