The Navy can get to President Donald Trump’s promise of 350 ships within “10 to 15 years with a relatively small investment” by maintaining ships better, according to the head of Naval Sea Systems Command. By extending each ship’s service for five years, the Navy could reach 350 ships by 2030, not 2045. Increasing the service-life of each Navy ship to about 40 years would be the equivalent of buying seven or eight new ships, Breaking Defense reported.