Almost 85 % of the USS Constitution had to be replaced for the ship to be in good enough condition to sail after 1929 .
She emerged from dry dock on 15 March 1930 , and many amenities were installed to prepare her for the three-year tour of the country , including water piping throughout , modern toilet and shower facilities , electric lighting to make the interior visible for visitors , and several peloruses for ease of navigation .
USS Constitution