GMorrison
This boat would have been a nightmare to sail in the dark. A rail about a foot above the deck and that grub beam half way back. Maybe not a big deal in the Sound, but imagine halfway across the Atlantic tripping and going over.
I want to remember reading, ages and ages ago about a racing crew sailing a similar vessel across the Atlantic. I want to remember that they rigged temporary lifelines for the crossing.
As mentioned above, these were austere vessels built for speed, not comfort. The area under the cockpit would have a compartment mostly to secure the ship's papers in; perhaps a bare-bones cabin for the owner. The rest of the space was open hold, with a platform or orlop over the bilges to stow the sails upon.
So, for the ocean crossing, a frame of cribbing was set up under one of the hatches , upon which the iron stove was lashed. Some bins for fuel for the stove would be fit to the cribbing, too. Had to be under a hatch as there is no Charlie Noble on these vessels. Berthing was by way of hammocks from deck beams, or by flaking out on the bagged sails.
That grub beam probably had some structural merit; but, as noted above, probably existed as a social limit. Only those of suitable station were allowed aft of it.
The model is shaping up a beauty, and we are the better for having seen it.