For forward cabins in a 37.5' Power Catamaran, one in the Port
Hull, and one master cabin midships, under the foredeck, is it best for
sleeping comfort that the beds run fore/aft or port/starboard.
No.
At the dock, it makes no difference at all because there is almost no
boat motion. Underway in rough water I don't think you will be
spending much time sleeping in regular berths, perhaps a nap in some
pilot berth situation like the dinette seats on my PDQ. Underway in
flat water I wonder how many people you would have aboard on an
overnight trip that you could consider any of them getting a good
night's sleep while the other(s) are driving the boat. At anchor, where
you are by far most likely to be wanting to sleep and find the boat
bouncing around in wind or waves, it still won't matter that the boat is
quite likely to pitch and almost immune to rolling unless you have some
personal preference about which way you preferr to get tossed out of
bed. When those situations develop I find myself taking the second
anchor out in the dinghy to pull the hull around so the irritating waves
no longer give a bad boat motion, or I pull the hook and find a better
anchorage. Done that in the middle of the night many a time, each time
swearing I would never again do such a poor job of picking a sheltered
anchorage.
Cheers
Gary