Deepest point in Earth’s oceans

Deepest point in Earth’s oceans

Last updated: June 3, 2020 at 19:21 pm

10,994 m (36,070 ft) — The Challenger Deep, located in the Mariana Trench, 250 miles (400 km) southwest of Guam in the Pacific Ocean, is the deepest known point on the planet. It is named after the British survey ship Challenger II, which first surveyed the trench in 1951. The first humans to descend to Challenger Deep were Dr. Jacques Piccard and Dr. Don Walsh aboard the bathyscaphe Trieste (10,911 m / 35,797 ft) in 1960. James Cameron made the first solo descent to the Challenger Deep in 2012, and Victor Vescovo made the deepest dive to the Challenger Deep reaching the seafloor at a depth 10,925 m (35,843 ft) on April 28, 2019.

Depth surveyed by the United States Center for Coastal & Ocean Mapping in 2010 (± 40 m / 130 ft)

Caladan Oceanic

Five Deeps Expedition

Bathyscaphe Trieste. ROLEX Media Release

Lt. Donald Walsh and Dr Jacques Piccard aboard the Bathyscaphe Trieste. Photo by U.S. Navy

The Deepsea Challenger is only one-tenth the weight of the the Bathyscaphe Trieste, the first and only other manned submersible ever to reach the bottom of the Challenger Deep in 1960. Media release photo by Mark Thiessen | National Geographic

Please note that comments are moderated: (1) Stay on topic (2) Be respectful (3) Refrain from vulgarity and abusive language (4) Do not make personal complaints about a person’s character, business, work or associations (5) Do not publish materials that violate copyright. OFFENDING COMMENTS WILL BE DELETED.

If you have claim to a diving or underwater record or first, if you know of a significant first or record not listed here, or if you can demonstrate that any of the information on this website is false or outdated, please complete the form on the record submission page.

In order to ensure your browsing experience is as enjoyable as possible, banners are kept to an absolute minimum, which means that advertising revenues alone cannot sustain this 100% FREE publication. Researching and updating the Diving Almanac requires a lot of time and dedication. If you believe the diving community needs a central body of information to record, validate and make available our shared history and accomplishments, please show your support by making a contribution to the Diving Almanac via PayPal (Porbeagle Press). Thank you!

First to dive the Five Deeps

By Jeffrey Gallant

Victor Vescovo was the first human to dive to the deepest point in each of the Earth's oceans using the deep submergence vehicle [...]

Deepest submersible dive (Solo | Men)

By Jeffrey Gallant

10,925 m (35,843 ft) — Victor Vescovo (USA) aboard the DSV Limiting Factor (Triton 36000/2 model submersible) | Five Deeps Expedition, April 28, 2019 [...]

Deepest fish (Observed)

By Jeffrey Gallant

The Swire's snailfish (Pseudoliparis swirei) was captured on video at the depth of 8,178 m (26,831 ft) in 2017. This species, more commonly referred to as the Mariana snailfish [...]

Deepest diving submersible (In service)

By Jeffrey Gallant

The DSV Limiting Factor dived four times to the bottom of the Challenger Deep in April-May 2019, including the deepest dive ever made by a submersible [...]

Deepest dive by a head of state

By Jeffrey Gallant

5,109 m (16,762 ft) — HSH Prince Albert II accompanied Victor Vescovo to the deepest point of the Mediterranean Sea, the Calypso Deep, on [...]

Deepest watch (Prototype)

By Jeffrey Gallant

10,925 m (35,843 ft) — Omega Seamaster Planet Ocean Ultra Deep Professional. Two of the Omega timepieces were strapped to the manipulator [...]

Deepest point in Earth’s oceans

By Jeffrey Gallant

10,994 m (36,070 ft) — The Challenger Deep, located in the Mariana Trench, 250 miles (400 km) southwest of Guam in the Pacific Ocean, is the deepest [...]

Deepest submersible dive (Ocean)

By Jeffrey Gallant

10,925 m (35,843 ft) — Victor Vescovo (USA) aboard the DSV Limiting Factor (Triton 36000/2 model submersible) | April 28, 2019 | Challenger Deep [...]

Oldest diver (Men)

By Jeffrey Gallant

99 — William Lambert (USA) celebrated his 99th anniversary with a birthday dive in Pearl Lake, Illinois, on September 5, 2019. He remained at the depth of 9.7 m (32 ft) for 20 minutes [...]

Fastest drift dive

By Jeffrey Gallant

17.68 knots (32.74 km/h / 20.34 mph) — Sechelt Rapids (Skookumchuck Narrows), British Columbia, Canada. It is estimated that for a 3.6 m (12 ft) tide, 757 billion litres of seawater flow [...]

Largest jellyfish

By Jeffrey Gallant

Lion’s mane jellyfish (Cyanea capillata) — The largest individuals have a bell diameter of 2.3 m (7.5 ft) with over 800 tentacles; some reaching lengths of 37 m (120 ft). Despite its [...]

Deepest octopus

By Jeffrey Gallant

Dumbo octopus (Grimpoteuthis) — 6957 m (22,825 ft), Java Trench (Indian Ocean). The octopus was remotely observed using an autonomous baited camera and trap lander in [...]

First documented case of hydrogen psychosis

By Jeffrey Gallant

Capt Steve Zissou suffered from the debilitating effects of Crazy Eye after witnessing the demise of his diving companion and partner, Esteban du Plantier [...]

Clearest water

By Jeffrey Gallant

80 m (262 ft) or the approximate visibility of distilled water. A few locations are claimed to equal the visibility of distilled water, including the Weddell Sea (Antarctica), New Zealand’s [...]

First underwater colony

By Jeffrey Gallant

1963 — Conshelf II (France). Seven divers lived underwater off Sha’ab Rumi (Sudan) in the Red Sea for one month under the supervision of Jacques-Yves Cousteau. The colony [...]

Most fin patents

By Jeffrey Gallant

Bob Evans (USA) — Since 1971, he has patented 33 revolutionary fin designs including the Force Fin Tan Delta (polyurethane) which is part of the permanent collections of the New York [...]

Largest glacier calving ever filmed

By Jeffrey Gallant

The largest glacier calving event ever recorded took place on May 28, 2008, when Adam LeWinter and Director Jeff Orlowski were filming the Ilulissat Glacier [...]

First aquanaut (Men)

By Jeffrey Gallant

1962 — Robert Sténuit | Man-in-the-Sea I project by Edwin A. Link. Sténuit spent 24 hours and 15 minutes in a submersible decompression chamber (SDC) at a depth of 61 m (200 ft) [...]

Longest migration (Shark)

By Jeffrey Gallant

20,142 km (12,516 miles) — A whale shark (Rinchodon typus) was tracked by satellite from Panama to the Mariana Trench between April 2012 and [...]

Oldest active scuba club

By Jeffrey Gallant

1938 — Göteborgs Amatördykarklubb (Gothenburg Amateur Diving Club). The club, which was founded on October 22, 1938, began its activities after receiving two Le Prieur [...]