German aerospace engineer Rüdiger Koch spent 120 days living in an underwater habitat at 11 meters depth off Puerto Lindo, Panama, breaking the previous 100-day record.
Record no. MRB-2026-006362
Longest time living underwater without depressurization
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.