The naval command quickly settled on "Project 1", as it had the most balanced combination of speed and combat power—offensively and defensively—that could realistically be achieved within the displacement constraints imposed by the Washington Treaty (and the existing French shipyard facilities). But concerns over the perceived lightness of the secondary battery compared to foreign capital ships led the command to request studies for a new secondary battery, despite the fact that this would preclude the possibility of using dual-purpose guns. The designers submitted two options: five triple or four triple turrets, with a heavy anti-aircraft battery of guns; the five turret variant would include six of the 75 mm guns, while the four turret version would add two of the 75 mm weapons. These proposals presented several problems: first, the anti-aircraft guns were sensitive to blast effects from the main and secondary batteries, which would require additional space that was not available, and second, the "Project 1" design was already overweight, and the added guns would increase displacement even further. The naval command ultimately decided on 14 April 1935 that new dual-purpose mounts for the 152 mm guns would have to be developed.