Archimède

The bathyscaphe Archimède is a deep diving research submersible of the French Navy. It used of hexane as the gasoline buoyancy of its float. It was designed by Pierre Willm and Georges Houot. In 1964, Archimède descended into "what was then thought to be the deepest part of the Puerto Rico Trench", which the NY Times reported as.
Archimède was christened on 27 July 1961, at the French Navy base of Toulon. It was designed to go beyond, and displaced 61 tons. In October 1961, Archimède passed its first dive tests, diving to uncrewed. On 27 November 1961, Archimède achieved a speed of, over a distance of at a depth of in the Mediterranean Sea.
On 23 May 1962, Archimède descended to off Honshu, Japan, in the Pacific, at the Japan Deep. On 15 July 1962, Archimède descended to into the Kuril–Kamchatka Trench, making it the second deepest dive ever, at that point in time, second only to the dive on the Challenger Deep. On 12 August 1962, Archimède descended to in the Japan Deep south of Tokyo.
Archimède explored the Mid-Atlantic Ridge jointly with the submarine Cyana and submersible, in Project FAMOUS in 1974.
Archimède operated until the 1970s. It was placed on reserve in 1975, and decommissioned in 1978.
Since 2001, Archimède is on display at the Cité de la Mer museum in Cherbourg.
Archimède was honoured with a stamp in Palau.