How deep is the ocean?

An amazing video published on youtube by National Geographic. How deep is the ocean (on average) and the Mariana Trench, the deepest part of the world’s oceans?

On March 26, 2012, Canadian film director James Cameron (born August 16, 1954) has reached the bottom of the Mariana Trench in the submersible vessel Deepsea Challenger. He is the first person to do this in a solo descent, and is only the third person to do so ever.

The first was the manned descent by Swiss-designed, Italian-built, United States Navy-owned bathyscaphe Trieste which reached the bottom at 1:06 pm on 23 January 1960, with Don Walsh and Jacques Piccard on board. Iron shot was used for ballast, with gasoline for buoyancy. The onboard systems indicated a depth of 11,521 m (37,799 ft), but this was later revised to 10,916 m (35,814 ft). There were also two unmanned descents: ROVs Kaikō in 1996 and Nereus in 2009.

These first three expeditions directly measured very similar depths of 10,902 to 10,916 m.

The video covers Cameron’s descent in one minute.

  • 0-660 feet (0-200 meter) 90% of ocean life lives here.
  • 800 feet (243 meter) Dive depth of the nuclear submarine.
  • 1,090 feet(1) Deepest recorded scuba dive.
  • 3,300 feet (~1,000 meter) Latest trickle of sunlight.
  • 9,816 feet (2,992 meter)(2) Deepest diving whale (Cuvier’s Beaked Whale).
  • 12,467 feet (3,800 meter) Titanic’s final resting place.
  • 14,000 feet (4267 meter) Average depth of the ocean.
  • 25,262 feet (7,700 meter) Snailfish, the deepest living fish ever filmed.
  • 29,029 feet (8,848 meter) Mount Everest, also known in Nepal as Sagarmāthā and in Tibet as Chomolungma. Earth’s highest mountain. It is located in the Mahalangur mountain range in Nepal. Its peak is 8,848 meters above sea level.
  • 35,813.65 feet (10,916 meter) Depth Trieste reached with Don Walsh and Jacques Piccard on board.
  • 36,070 feet (10,994.136 meter) James Cameron reached in 2012 in the submersible vessel Deepsea Challenger.
  • 36,069.55 feet ± 131.234 feet (10,994 meter ± 40 meter) maximum-known depth of the Mariana Trench(3).


  1. Video says 1044 feet, but it was then. Now, in 2014, Ahmed Gabr, a 41-year-old Egyptian diver broke the record with 1090 feet 4.5 in (332.35 meter) in 2014. Ahmed’s amazing dive broke the previous mark of 318.25 m (1,044 ft) by South African Nuno Gomes in 2005, also off the coast of Dahab.
  2. In the video, it is marked as 8200 feet, but in 2014, Cuvier’s Beaked Whale Sets Records for Longest and Deepest Dive.
  3. Some unrepeated measurements place the deepest portion at 11.03 kilometers (6.85 mi, 36187.664 feet).


M. Özgür Nevres

I am a software developer, an ex-road racing cyclist, and a science enthusiast. Also an animal lover! I write about the planet Earth and science on this website, You can check out my social media profiles by clicking on their icons.

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