Because the service has just classified ship inspection reports, and the only reason that I can think of their doing so is to cover up either bad reports on newly constructed ships, or of maintenance shortcomings for the existing fleet:

InSurvs are circulated widely among commanders and technical authorities within the Navy, but seldom seen by civilians unless they’ve been specifically requested under freedom of information laws. Even then, Navy officials can redact the names of people; information about classified equipment; or trade secrets of shipbuilders or other venders.

Over the past year, InSurvs obtained by Navy Times have revealed severe problems aboard the cruiser Chosin, the destroyer Stout and the amphibious transport dock New Orleans.

(emphasis mine)

Maybe I’m just paranoid, but I think that there are a lot more “severe problems” out there.