"The Navy historically has only rarely named ships for living persons. Since 1974, at least 19 U.S. military ships have been named for persons who were living at the time the name was announced. Eight of the 19 have been announced since January 2012, including three announced in 2012 and four announced in 2016. Members of the public are sometimes interested in having Navy ships named for their own states or cities, for older U.S. Navy ships (particularly those on which they or their relatives served), for battles in which they or their relatives participated, or for people they admire. Congress has long maintained an interest in how Navy ships are named, and has influenced the naming of certain Navy ships. The Navy suggests that congressional offices wishing to express support for proposals to name a Navy ship for a specific person, place, or thing contact the office of the Secretary of the Navy to make their support known. Congress may also pass legislation relating to ship names. Measures passed by Congress in recent years regarding Navy ship names have all been sense-of-the-Congress provisions."
CRS Report for Congress, RS22478
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html