Do they carry 24? In our book, Trident in 1984, we suggested the use of rotary launcers that would allow a single Trident to carry 160-something of these!!!
The SSGN conversion allows for seven Tomahawk missiles to be placed into eack large missile tube. A circular pattern of six with one in the middle for seven. 22 of the silos are used for missiles, so that's 154 Tomahawk missiles in each SSGN. The other two silos are used for the SEALS.