Twenty Thousand Leagues Under the Seas · Jules Verne, 1870

How deep did the Nautilus dive in Twenty Thousand Leagues?

16,000m

Four leagues down, in the South Atlantic in March 1868, with 1,600 atmospheres pressing on the hull. The real ocean is nowhere that deep.

See the Nautilus head south
For scale
Nautilus's deepest dive 16,000 mChallenger Deep, deepest point on Earth 10,935 mWreck of the Titanic 3,800 mAronnax's limit for sea life: 3 leagues 12,000 m

From the bookReal world

On the way south to the Pole, in the South Atlantic at about 45° south, Nemo decides to test the old soundings. Ships there had let out 14,000 and even 15,140 metres of line without touching bottom. So he takes the Nautilus down to see.

Below three leagues the last shells and starfish disappear, and they have passed, Aronnax writes, the limit of life. At 16,000 metres, four leagues, the iron plates tremble, the bars bend and the salon windows seem to bulge under 1,600 atmospheres. Then Nemo calmly offers to take a photograph of the sea floor.

Verne was going by the soundings of his day, which were badly wrong. The real South Atlantic there is about 5 or 6 km deep, and the deepest point in any ocean, the Challenger Deep, is about 10,935 m. And life goes all the way down.

See the Nautilus head south

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