2.2 Chemical oceanography 29 Distance Feet Meters 18,000 5486 00 –33 –10 –66 –20 Pressure ATM PSI 0.5 7.34 1 14.7 2 29.4 3 44.07 kPa 50.6 101.3 202.6 303.9 FIGURE 2.3 Pressure in atmospheres from various levels.