How does air pressure affect a submarine?

Air pressure affects a submarine primarily through the water pressure it experiences at varying depths. As a submarine descends, the external water pressure increases, which can impact its structural integrity. Submarines are designed to withstand these high pressures, but if they fail to maintain proper internal pressure and buoyancy control, it can lead to dangerous situations. Additionally, the submarine's buoyancy systems must adjust to changes in pressure to ensure safe navigation and stability underwater.