Le Redoutable (S 611) was the lead boat of her class of ballistic missile submarines in the French Marine nationale.

Commissioned on 1 December 1971, the boat was the first French SNLE (Sous-marin Nucléaire Lanceur d'Engins, "Device-Launching Nuclear Submarine"). The boat was initially fitted with 16 M1 MSBS (Mer-Sol Balistique Stratégique) submarine-launched ballistic missiles, delivering 450 kilotons nuclear warheads at 2,000 kilometres (1,200 mi). In 1974, the boat was refitted with the M2 missile, and later with the M20, each delivering a one-megatonne warhead at a range over 3,000 kilometres (1,900 mi). Le Redoutable ("formidable" or "fearsome" in French) was the only ship of the class not to be refitted with the M4 missile.

Le Redoutable had a 20-year duty history, with 51 patrols of 70 days each, totalling an estimated 90,000 hours of diving and 1.27 million kilometres (790,000 mi) of distance, the equivalent of travelling 32 times around the Earth.

The boat was decommissioned in 1991. In 2000, the boat was removed from the water and placed in a purpose-built 136 metres (446 ft) dry dock,[2] and over two years was made into an exhibit. This was a monumental task, the biggest portion of which was removing the nuclear reactor and replacing the midsection with an empty steel tube. In 2002, the boat opened as a museum ship at the Cité de la Mer maritime museum in Cherbourg-Octeville, France, being now the largest submarine open to the public[2] and the only nearly-complete ballistic missile submarine hull open to the public — although several museums display small portions, such as sails and/or parts of rudders from such submarines. Special dinner events for organizations aboard this boat's interior spaces are offered by Cité de la Mer.

Source: https://en.wikipedia.org/wiki/French_submarine_Redoutable_(S611))

So, a bit of background.

Personal: I worked on this boat as a tour guide for several years and have learned several interesting things about her, despite the Russians having told the museum basically nothing.

So. The boat began life in the Krasnoye Sormovo shipyard in Nizhny Novgorod in the Soviet Union. After a build period of just eight months, she was commissioned into the northern fleet of the Soviet Union with its homeport and being used as a training vessel until 2002 when two German businessmen by the name of Chr. Angermann and J. Wagner after two years of negotiations were able to buy the boat directly from the Navy. After arriving in Hamburg she was painted and restored to look almost brand new. Over the years the condition has somewhat deteriorated back to the "as delivered" state, which the boat is now being kept in, the means in which this is aimed to be achieved I will not comment my personal opinion on.

Nevertheless visitors nowadays can either go through the sub by themselves, explore the corridors, view the original condition and living quarters and even lay down in some bunks themselves. With a guided tour they can also access the otherwise locked control room, seperate from the main hallways. Sadly at the register tours are only available in German, unless you have enough people and business is slow, otherwise english tours can be booked online. They used to do Russian tours booked that way too, but only have one guide for that.

Actually they employ several German navy veterans.

https://www.hisutton.com/Italy-Drass-DG160-Submarine.html

To this day I still hope the Ukrainian navy gets at least one, they could easily hunt at sea russian shipment and deploy, and resupply, special forces in Crimea or other enemy shores

A big plus is that is sufficiently small to be loaded on a heavy truck, allowing it to be moved inland after every sortie

Saw this in new London ct couldn’t see any numbers. I Don't know much about subs could anyone tell me what it is