Engineering Submarine Safety

Discover the incredible engineering behind the research submarine Alvin, which withstands immense underwater pressure. Bruce reveals that at depths of 22,000 feet, the pressure on Alvin's hatch equates to the weight of nearly 4,747 planes. The key to its safety lies in the personnel sphere, a titanium alloy capsule designed to evenly distribute pressure, ensuring that the ocean's force doesn't compromise the safety of those inside.