There is an awful lot of crap in there, isn't there? Thanks for the picture, Bob.
In other topics of the Spruance-class, there has been a lot of speculation about why the Spruances never got VLS back aft when they were upgraded with strike length VLS in place of their ASROC launcher and magazine in the '80s and '90s. Some even as notable as Norman Friedman have said it was because of propeller shafts and things of that nature. Simply looking at an accurate model of the ship or even comparing it to the Ticonderoga-class which utilizes the same hull you can tell that's not the case at all. In reality, neither machinery and hull depth was why they never got VLS in the aft missile deck. If that were the case, you would simply elevate the VLS as high as the helo deck and you would be good to go.
VLS could have fit in there, sure, but the issue was instead that the structural integrity of the aft missile deck was not strong enough to support the weight of what would have been put in those strike-length VLS tubes under all maneuvering and battle conditions: very heavy tomahawk and ASROC missiles. The reason why the Ticonderogas could accommodate it aft was because they are said to have been built heavier and stronger in that area of the ship. What the Spruances could take in that area, however is compliment of SM-2 missiles. SM-2s can be accommodated in both stike length and tactical length VLS arrangements. While that kind of arrangement would have given the ship up to 61 SM-2s, the ship did not have an appropriate weapon direction system nor the illuminators to accommodate such a ship system change. So, while that entire area was designed to accept a Mk26 launcher, a strike length VLS 61-cell arrangement in that area loaded with TLAM and ASROC may have weighed more and caused more issue to the ship (...so for those who want to know you can add up the payload of a 61-cell VLS arrangement and compare it to a fully armed Mk26 system and see if the above assertion is indeed correct).
Another reason they did not get VLS aft was money. VLS is relatively cheap. Cutting the ship up to install it, however is not. The man-hours involved with rearranging the internals of the ship like that are numerous and put the cost of the actual weapon system to shame.
There is another possibility, too. We know the strike-length VLS can fit aft. As has been stated, the ship cannot take the stresses caused by the weight of 61 TLAMs. The other possibility reflects how VLS are actually filled when a ship is armed today, and that is by missile arrangement. Most of the time missiles are arranged in the VLS system in a particular order for redundancy and maximum reliability. In the case of the aft arrangement, if situation dictated that the DDG needed to go to sea with more than 32 long missiles such as TLAM or SM-2BlockIV, those longer and heavier weapons could be situated in only a few of the the center-line modules, perhaps the center four forward modules (of the half closest to the flight deck). The rest of the tubes would have stands called "gas management" in the bottoms of them so the ship�s fill of SM-2s have something to sit on. This is only a possibility, and I would love it if CAPT Potter would chime in about the possibility of only light-loading the aft VLS with a few TLAMs and their specific positioning to reduce stress on the hull if the mission required it.
So, as was seen earlier in this thread my DDG version of the Spruance-class will have VLS aft, and it will be armed with SM-2s unless tech shows up to the contrary (but this really doesn�t matter, because you can�t tell on a model what�s in the VLS tubes

). Forward will be a 32-cell VLS with a Mk71 positioned forward of that. On the stern will be the Mk45 Mod 4. Whew! This ship is going to carry a punch!
...and look what the Navy gave up. Sheesh.
