World's Largest Liner Launched By Queen Elizabeth -- The "Queen Elizabeth" going down the slipway after being launched by Queen Elizabeth on Clydebank, Scotland today September 27. A button pressed by Queen Elizabeth on September 27, at Clydebank, Scotland, launched her namesake "Queen Elizabeth" the world's largest liner. The boat is 1030 feet in length, and has a gross tonnage of 85000 tons. The king was to have been present at the naming ceremony, but was prevented from doing so by the international situation. The two royal princesses accompanied their mother. September 27, 1938. (Photo by Associated Press Photo).