 In the 1980s , when the Reagan administration , as part of its " 600 @-@ ship Navy " plan , recommissioned all four of the Iowa @-@ class battleships , the U.S. Navy recovered large amounts of specialized equipment and spare parts that were still in storage aboard Massachusetts . Despite being used as a parts cache to get the Iowa @-@ class battleships back in service , Massachusetts was added to the National Register of Historic Places and was designated a National Historic Landmark 14 January 1986 . 
