IT’S BIG: New Look at America’s Next Ballistic Missile Submarine. “The Columbias feature several qualitative enhancements fostered in the 5 decades since the inception of the Ohio-class, including a quieting and propulsion technology leap (including electronic input for the control surfaces), new sonar arrays and other sensor upgrades, and additional space granted by the Columbia’s larger size. Despite the Columbia’s increased size, the amount of Trident missiles aboard drops from 24 on the Ohios to 16, with the jury still out on uses for the extra tonnage.”

I’d really like to know, but those who do know can’t say.