USS Boxer, LHD-4, is one of 7 currently active Wasp class amphibious assault ships (one has been retired). The Wasp class is being superseded the ~10% larger America class LHAs, of which 2 are in commission, 2 are under construction (USS Bougainville, LHA-8, could be commissioned this year), and 7 more are planned. So USS Boxer having to undergo unplanned repairs is significant, but with 8 other "big-decks" in service, it's not even almost a crisis.