German Engineer Sets Underwater Living Record: 120 Days Beneath the Waves

“Rudiger Koch redefines human boundaries, living underwater for 120 days in a custom capsule off Panama’s coast, breaking the previous Guinness World Record.”

January 25, 2025: Rudiger Koch, a 59-year-old German aerospace engineer, has achieved a remarkable milestone by setting a new Guinness World Record for the longest continuous underwater habitation without depressurization. Koch spent 120 days in a specially designed submerged capsule located 11 meters (36 feet) below the Caribbean Sea, off the coast of Puerto Lindo, Panama.

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On his emergence, Guinness World Records adjudicator Susana Reyes confirmed that Koch surpassed the previous record of 100 days, held by American Joseph Dituri. Koch expressed mixed feelings about leaving his underwater sanctuary, saying, “It was a great adventure, and now that it’s over, there’s almost a sense of regret. I enjoyed my time here very much.”

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Koch’s underwater capsule, a 30-square-meter (320-square-foot) home, was equipped with essentials for modern living, including a bed, toilet, TV, computer, internet, and even an exercise bike. Solar panels provided electricity, and a narrow spiral staircase connected the capsule to a surface chamber for food delivery and visitor access, though there was no shower. Four cameras continuously monitored his movements, health, and adherence to the rules.

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During his stay, Koch was mesmerized by the serene beauty of the underwater world. “It is beautiful when things calm down, it gets dark, and the sea is glowing. It’s impossible to describe—you have to experience it yourself,” he shared.

Koch celebrated his achievement with champagne and a cigar, followed by a swim to a waiting boat that carried him ashore for a celebratory party. Inspired by Jules Verne’s Captain Nemo from Twenty Thousand Leagues Under the Sea, Koch kept a copy of the sci-fi classic in his capsule, drawing parallels to his futuristic endeavor.

Koch sees this feat as more than just a record—it’s a vision for the future of humanity. “What we are trying to do here is prove that the seas are a viable environment for human expansion,” he said, hoping to inspire new ideas about underwater habitation.

The record-breaking effort involved rigorous monitoring to ensure compliance. Susana Reyes acknowledged the feat as “one of the most extravagant records, requiring immense dedication and meticulous planning.”

This achievement not only pushes the boundaries of human endurance but also opens a new chapter in exploring underwater living possibilities.

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UnderwaterLiving, WorldRecord, RudigerKoch, GuinnessWorldRecord, OceanExploration, HumanInnovation, Sustainability, CaptainNemo,