The Oceanic Steam Navigation Company or White Star Line of Boston Packets, more commonly known as the White Star Line, was a prominent British shipping company, today most famous for its ill-fated vessel, the RMS Titanic, and the World War I loss of Titanic's sister ship Britannic

HMHS Britannic

HMHS Britannic was the third and largest of the White Star Line. She was the sister ship of and , and was intended to enter service as a transatlantic passenger liner. She was launched just before the start of the First World War and was laid up at her builders in Belfast for many months before...

. In 1934 the line merged with its chief rival, Cunard Line

Cunard Line

Cunard Line is a British-American owned shipping company based at Carnival House in Southampton, England and operated by Carnival UK. It has been a leading operator of passenger ships on the North Atlantic for over a century...

, which operated as a separate entity until 2005 and is now part of Carnival Corporation & PLC

Carnival Corporation & plc

Carnival Corporation & plc , is a American-British Company, and the world's largest cruise ship operator. It is a dual listed company, with headquarters at Carnival Place in the Miami suburb of Doral, Florida, USA, and at Carnival House in Southampton, England, UK...

.