To address these problems, a final set of designs, "XVI-B"–"XVI-D", was presented by Preliminary Design in October 1936. They were modifications of the "XVI" plan for a ship that was 714 ft. long, had twelve guns in three quadruple turrets, a belt of sloped at °, and a deck thick. In the final set, length was fixed at for greater speed, but this meant only eleven 14-inch guns could be mounted with a thin belt. Alternatively, one gun could be traded for a belt, and another could be swapped for a 30-knot speed and one more tenth of an inch of belt armor; this became design "XVI-C". The General Board liked "XVI-C" very much, seeing in it a ship that had enough protection to fight—and survive—in a battle line formed with the older battleships while also having enough speed to operate in a detached wing with, for example, aircraft carrier or cruiser commerce raiding groups.