Pressure at 330ft (aka 100m, way way shallower than Titanic depths) is 10 atmospheres higher than what it is at the surface. Even at 50k feet (higher than most

Pressure at 330ft (aka 100m, way way shallower than Titanic depths) is 10 atmospheres higher than what it is at the surface. Even at 50k feet (higher than most planes operate) air pressure is still > 0.1 atmospheres. Titanic depths are around 380 atmospheres pressure. So equivalent to the difference of about 133,700 feet and sea level.