Olympic-class ocean liner of 29 coal-fired steam boilers in six compartments. However, "Olympic"s boilers were adapted for firing by oil at the end of the First World War, which reduced the number of engine crew required from 350 to 60. The "Olympic"-class ships were long, displacing normally (their draft at this displacement being ), and their tonnage was around 45-46,000 GRT. "Olympic" became the largest ship in the world when it was completed in May, 1911 before losing the title to its sister "Titanic" when she was completed in April, 1912. After the loss of "Titanic" the third sister ship "Britannic" claimed the
Examination vessel Examination vessel An examination vessel is a vessel used to inspect ships and boats entering a port during wartime. An examination vessel would typically be responsible for examining and verifying all merchant ships and small craft entering or departing a port. They would normally be equipped with one or more machine guns and in addition were often supported by one or more shore gun batteries, sometimes called examination batteries. In the case of United States Army Coast Artillery Corps defenses in World War II, a Harbor Entrance Control Post on shore would interrogate a vessel, and a nearby examination battery