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
Saryu-class patrol vessel subsequently with an interval of six months each. INS "Sumitra", the fourth and last OPV, was delivered to the Navy by GSL on 16 July 2014. Two ships were delivered to Sri Lankan Navy in 2017 and 2018. Saryu-class patrol vessel The "Saryu" class of offshore patrol vessels (OPV) are advanced patrol ships of the Indian Navy built at the Goa Shipyard Limited. These vessels are capable of ocean surveillance and monitoring and can maintain control of shipping lanes. They can also be deployed to provide security to offshore oil installations, and other naval assets. "Saryu" class was derived from