The ans is - White star line
Around 1910, the White Star Line was building three sister ships: The Titanic, The Gigantic (later named the Britannic) and which other?
The HMHS Britannic, sister ship to the Titanic and heir to the experience gained by that sinking, was completed at the end of 1915 and requisitioned as what before falling foul of a mine and sinking in 1916?