If US can attack Iranian nuclear threats with missiles, they can also target ancient Iranian Navy with warships from 1936 ( Hamzeh Class Corvettes - former yachts, rebuilt in 1965 ), but I think US Navy can not target, because US Navy are not prepared to fight with so old and ancient ships - most possible from wood. Radar can not see wood. See link here - https://en.wikipedia.org/wiki/List_of_current_ships_of_the_Islamic_Republic_of_Iran_Navy