Olympic-class ocean liner

Belfast, 6 March 1912: Titanic (right) moved out of the drydock to allow Olympic (left) to replace a damaged propeller blade
Class overview
Builders	Harland and Wolff, Belfast
Operators	White Star Line; Cunard-White Star Line[1]
Preceded by	Athenic class
Built	1908–1914
In service	1911–1935
Planned	3
Completed	3
Lost	2
Retired	1
General characteristics
Type	Ocean liner
Tonnage	45,000 GRT - 48,000 GRT
Displacement	52,310 tons
Length	882 ft 9 in (269.1 m) overall
Beam	92 ft 6 in (28.19 m)[1] (Olympic & Titanic), 94 ft (28.7 m) (Britannic)
Height	205 ft (62 m) from keel to top of masts
Draught	34 ft 7 in (10.54 m)[1]
Depth	64 ft 9 in (20 m) from keel to side of C-deck
Decks	9
Installed power	24 double-ended and 5 single-ended 15 bar Scotch marine boilers, tested to 30 bar. Two 4-cylinder reciprocating engines for the two outboard wing propellers. One low-pressure turbine for center propeller. Together 50,000 HP nominal, 59,000 max.[2][3][4]
Propulsion	Two bronze 3-blade wing propellers. One bronze 4-blade centre propeller for Olympic & Britannic. One bronze 3-blade centre propeller for Titanic
Speed	21 kn (39 km/h; 24 mph); 23 kn (43 km/h; 26 mph) max
Capacity	3,327 passengers, officers, and crew[1]
Crew	892 crew members

The Olympic-class ocean liners were a trio of British ocean liners built by the Harland & Wolff shipyard for the White Star Line during the early 20th century, named Olympic (1911), Titanic (1912) and Britannic (1914). All three were designated to be the largest as well as most luxurious liners of the era, devised to provide White Star an advantage in the transatlantic passenger trade.

Whilst Olympic, the primary vessel, was in service throughout almost a quarter of a century 24 years before being retired for scrap in 1935, her sisters would not witness similar success: Titanic struck an iceberg and sank on her maiden voyage and Britannic was lost whilst serving as a hospital ship during the First World War after hitting a mine off Kea in the Aegean Sea before entering service.

Although two of the vessels did not achieve successful enough legacies, they are amongst the most famous ocean liners ever built; Both Olympic and Titanic enjoyed the distinction of being the largest ships in the world. Olympic was the largest British-built ship in the world for over 20 years until the commissioning of Queen Mary in 1936. Titanic's story has been adapted into many books, films, and television programs and Britannic was the inspiration of a film of the same name in 2000.