Tonga Trench

The Tonga Trench is an oceanic trench located in the South Pacific Ocean. It is 10,882 metres (35,702 ft) deep at its deepest point, known as the Horizon Deep. According to the August 2011 version of the GEBCO Gazetteer of Undersea Feature Names, the location and depth of the Horizon Deep are given as 23°15.5′S 174°43.6′W / 23.2583°S 174.7267°W / -23.2583; -174.7267 and 10,800 m (35,433 ft) ±10 m (33 ft).