The Marian Trench is the whole of the world's oceans.
 Nereus thus became the first vehicle to reach the Mariana Trench since 1998 to 2023 and the deepest-diving vehicle then in operation
 On this survey, the size of each of the three basins was refined to 610 km long by about 2 km wide and in excess of 10,850 m (35,597 ft) deep

