The '' Investigator '' primary tasks are hydrographic survey , nautical chart preparation , cartography and training , and it is equipped with a remotely operated underwater vehicle ( ROV ) , an autonomous underwater vehicle ( AUV ) and an unmanned surface vehicle ( USV ) . In early 2008 , the ship conducted a hydrographic survey in Seychelles in cooperation with the Seychelles Coast Guard ( SCG ) and the Seychelles People 's Defence Force ( SPDF ) . The survey covered the entire 32-nautical mile coast , from North Point to Petite Anse , replacing navigational charts made in 1890 . The '' Investigator '' conducted survey work in and around western Mahe that year ( to facilitate the preparation of a new navigational chart that year ) , In the same year , '' Investigator '' also conducted survey work in Mauritius , and surveyed 30 percent of the St. Brandon shoals ( part of the Outer Islands of Mauritius ) to update charts first prepared in 1851 and create a profile for a Mauritius Oceanography Institute – Commission on the Limits of the Continental Shelf survey . The survey of the Saya de Malha Bank allowed the government of Mauritius to claim an extended continental shelf beyond its exclusive economic zone . In 2013 , the '' Investigator '' surveyed the seas around the Andaman and Nicobar Islands . This survey was necessitated by the 2004 Indian Ocean earthquake and tsunami , which made massive geomorphological changes to the islands and their surrounding seafloor ( affecting the movement of ships and smaller watercraft )
2004 Indian Ocean earthquake and tsunami
2004 Indian Ocean earthquake and tsunami
INS Investigator