A completely new battleship design, introducing the concept of "all or nothing" armor. Although barely larger than the previous class, they were much better, more effective ships, and they set the pattern for all US battleships up to the Washington Treaty. They were also the first US battleships with triple turrets. The Nevada class was part of the "Standard type battleship" concept of the US Navy, a design concept which gave the US Navy a homogeneous line of battle (very important, as it allowed the Navy to plan maneuvers for the whole line of battle rather than detaching "fast wing"s and "slow wing"s). The "Standard" concept included long-range gunnery, moderate speed of 21 knots (39 km/h), a tight tactical radius of ~700 yards (640 m) and improved damage control. The other Standards wer