How deep can a submarine go?
Quick Answer
Military submarines typically operate at ~300–600 meters. The deepest crewed dive reached 10,928 meters — the DSV Limiting Factor piloted by Victor Vescovo in the Mariana Trench in 2019.
The Full Story
Submarine depth capability varies enormously by design purpose. Most military submarines operate at crush depths of 300–600 meters, with classified maximum depths potentially reaching 900 meters for advanced models. The Soviet Komsomolets submarine holds the military depth record at 1,027 meters (1985). For deep-sea exploration, the record belongs to Victor Vescovo's DSV Limiting Factor (a Triton 36000/2 submersible), which reached 10,928 meters in the Challenger Deep of the Mariana Trench on April 28, 2019. This beat the 1960 record of Jacques Piccard and Don Walsh (10,916 m in the Trieste). At these depths, pressure exceeds 1,100 atmospheres — equivalent to balancing 50 jumbo jets on your body. The Limiting Factor's titanium sphere hull is 9 cm thick to withstand this.
Key Facts
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Suggested video title for this topic:
"How Deep Can We Actually Go? — The Limits of Human Submarines"