The deck, the "coverage" of the hull of a boat, it's roof, floor and completion of "shell" waterproof hull. In goiters fishing, such as Marina di Alimuri was a partial coverage, to protect the hull from the waves that broke the bow, and provide a walking surface for the work and maneuvering the lateen sail on the bow.
In modern wooden boats, is achieved with panels of plywood covered with teak strips that mimic the "seams", the strips flat on which generations of hubs have consumed mop, knees and elbows.
course, the deck of the fishing boat "Santa Maria del Lauro" is