SELECT Name FROM ship ORDER BY Tonnage ASC
what are the names of the ships ordered by ascending tonnage?
[Schema (values) (types)]: | ship_mission |  mission : mission_id (text) , ship_id (number) , code (number) , launched_year (text) , location (number) , speed_knots (text) , fate (number) | ship : ship_id (text) , name (number) , type (number) , nationality (text) , tonnage (number);