The number of officers and crew members required to run the ship.
For every ship class, you'll find a data card that includes design dates, construction periods, technical specifications (displacement, dimensions, armament, machinery, speed), operational modifications, and the ultimate fate of each vessel. For the United States, this can include data for everything from WWII-era destroyers to modern nuclear-powered carriers. navypedia usa
The fast battleships of the North Carolina , South Dakota , and Iowa classes. The number of officers and crew members required