Generally, major overhauls will occur every five years or so on such vessels. But if there are enough "goodies" or necessary repairs or updates to warrant adding them sooner, and they are viewed critically enough, a vessel such as this will spend additional yard time in getting it done.Just read an article about HMS Ocean going in for some work. $105 million for radar, phalanx, plumbing and paint... Is it common to have a ship like this go in for year + work twice in 5 years?
They are simply too valuable to not warrant the latest technology, particularly when it comes to defense. The new radar and updates to the CIWS would fall in that category, and as long as it is in there there's no sense in not performing other maintenance and upgrades that would fit in the timeline as well.
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