Francisco ( 7000 tons ) , Colorado ( 5 , 000 tona ) , Buffalo ( 5 , 500 tons ) , Martello ( 5 , 000 lons ) , Himloo ( 5 , 500 lons ) , Galileo ( 4 , 000 tons ) , Apollo ( 5 , 000 tons ) , Chicago ( 4 , 000 tons ),