South Sandwich Trench

[1] The trench is 965 kilometres (600 mi) long and has a maximum depth of 8,266 metres (27,119 ft) below sea level at 55°13.47′S 26°10.23′W / 55.22450°S 26.17050°W / -55.22450; -26.17050, as measured by a Kongsberg EM124 multibeam sonar from February 2–7, 2019 during the Five Deeps Expedition.

This new deepest point is part of the same subsurface feature as the previous Meteor Deep location so the expedition recommended keeping the old name.

Pressure Drop completed an entire survey of the trench on February 9, 2019, and made the data publicly available to GEBCO in 2019.

The maximum depth of that ocean is also in the South Sandwich Trench, which was surveyed by the Five Deeps Expedition in early February 2019.

The expedition leader and chief submersible pilot Victor Vescovo has proposed naming this deepest point in the Southern Ocean the "Factorian Deep," based on the name of the crewed submersible DSV Limiting Factor, in which he successfully visited the bottom for the first time on February 4, 2019.

Map of the South Sandwich plate (SAN) shows its position between the Antarctic plate (ANT), the Scotia plate (SCO), and the South American plate (SAM). The East Scotia Ridge (ESR), the South Sandwich Islands (SSI), and the South Sandwich Trench (SST) are also visible.
DSSV Pressure Drop and DSV Limiting Factor at its stern