Francisco ( 7000 tons ) , Coloriitlo ( 5 , 000 tona ) , Illlffalo ( 5 , 500 tona ) , Martello ( 5 , 000 tons ) , lliudoo ( 5 , 500 tona ) , Galileo ( 4 , 000 tona ) , Apollo ( 5 , 000 tons ) ,Chicago