Scuba [TESTED]

: As you descend, the surrounding pressure increases, causing the air in your lungs, wetsuit, and BCD to compress. This requires more air for neutral buoyancy and significantly increases air consumption.

Diving beyond the recreational limit of 40 meters (130 feet) moves you into the realm of technical diving. : As you descend, the surrounding pressure increases,

For deeper or more complex dives, standard equipment is supplemented with redundant systems: : As you descend