The Navy is in the process of developing a replacement for the
class Trident ballistic missile submarines (SSBN). The next generation ballistic missile sub (SSBN[X]) is described in the recent CRS report (1) as containing 16 missile tubes versus 24 in the Ohio class. The tubes will be the same dimensions. The sub’s beam and displacement will be comparable to the Ohio ’s. So, although containing one third fewer missile tubes the SSBN(X) will be the same size as the Ohio . Throw in presumably smaller, more efficient nuclear plants, greater levels of automation, and the likelihood of reduced (or eliminated – though that seems unlikely) torpedo spaces and one might be tempted to reasonably conclude that the resulting sub should be smaller than the Ohio . Apparently, one would be wrong! Ohios
This seems totally illogical on the face of it and I don’t understand it. I’ll keep looking into this.
(1) Congressional Research Service, “Navy
Replacement (SSBN[X]) Ballistic Missile Submarine Program: Background and Issues for Congress”, Ronald O'Rourke, Ohio April 5, 2012