The German navy U-35 (S-185) was one of the submarines that took part in exercise Playbook Merlin 25 in the Baltic Sea, the vessel commissioned in 2015, is an active, advanced air-independent propulsion (AIP) sub known for its long endurance.

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USS Topeka (SSN-754) was launched at Electric Boat in 1988. At exactly midnight on New Year’s Eve 1999, Topeka parked at a depth of 400 feet, exactly at the intersection of the Equator and the International Date Line. The submarine simultaneously existed in two millennia, two centuries, two years, two seasons, two months, two days, and two hemispheres.

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USS Nimitz (CVN 68) aircraft carrier moving into dry dock at the Puget Sound Naval Shipyard (PSNS) in Bremerton, Washington, on March 16, 2018.

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