How does pressure affect submarines?

Pressure significantly affects submarines as they operate in deep ocean environments where water pressure increases with depth. As a submarine descends, the external pressure can compress the hull, requiring it to be designed with strong, reinforced materials to withstand these forces. If the pressure exceeds the structural limits of the submarine, it can lead to catastrophic failure. Submarines also use ballast systems to manage buoyancy and counteract the pressure effects during dives and ascents.