D
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Yes, I am aware. The first mention of the word "commonality" and "Constellation" occurs in an April 2, 2024 article from USNI. It reads as follows:The original design was supposed to have 80% commonality with her European cousins. That ratio has since inverted to 20% commonality. Not sure if NAVSEA has acknowledged this, but I’m pretty sure this information comes from the GAO.
> "At one point the Constellation design shared about 85 percent commonality with the original FREMM design, but the alterations have brought that commonality down to under 15 percent, a person familiar with the changes told USNI News."
However, note this quote says nothing about an "original design," nor does it specify what "alterations" were made to the design. There are three points I want to bring up.
A) We have no idea how or when the 85% commonality number was calculated. Was it before the contract design was awarded? Was it a few months before the USNI article? We lack the context to properly evaluate this information. If this number predates the contract design award, did they factor in requirements for domestically-sourced equipment? Additionally, how is "commonality" being defined?
B) "Alterations" do not equate to "changing design requirements." Historically, when design requirements change, NAVSEA has been very public about it. See the changes from DD-21 to DD(X), canceling Zumwalt's SPY-4, cancelling AMDR X-Band for the Flight IIIs, CG(X) and the MAMJDF results, LCS Lethality and Survivability Upgrades, etc.
I can't find any reporting explicitly saying that NAVSEA changed the design requirements, no mention the GAO, CBO, or CRS reports, news articles, or interviews. Historical precedent says that if something did change, we would know.
C) There's simply no way the original requirements would allow for 85% commonality. The entire superstructure had to be rebuilt to accept SPY-6s, the powerplant was modified, the armament was completely redone, a whole bow thruster was installed, and DC standards were drastically increased. Keep in mind the European FREMMs only share 5% commonality. Also note all major components have to be domestically sourced, which means changing everything from surface search radars to door handles. There is simply no way to have 85% commonality.
It seems to me the 85% number was floated in the preliminary design stage, and as mandated design changes were made to use domestically-sourced components and increase DC standards, that number inevitably shrunk. Note none of this requires altering the design requirements. For that matter, what would they even change?
Point is, you're basing your entire argument off an 2-sentence statement from an anonymous official. The 85% number was always unrealistic, nor we don't know when those numbers were calculated, let alone how. I remain utterly unconvinced NAVSEA changed the design requirements.
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