"Gascogne" represented a much more radical redesign; the superfiring main battery turret was moved to the quarterdeck, with the three secondary turrets moved to the centerline. Two superfired over the forward main battery turret and the third superfired aft. Rearranging the primary and secondary batteries had several benefits, most significantly freeing up the sides of the ship for the anti-aircraft battery, where they would be further from the blast effects of the larger guns. It also allowed all-around fire for the main and secondary batteries, as opposed to the other designs that had a fairly wide blind arc astern for the main guns. But it also presented problems for the design staff, since the superstructure would have to be moved forward to have enough space aft for the main battery turret and magazine, which then required extensive redesign of the hull to move the machinery spaces and keep a proper trim.