pressure in Pa = water density x depth x gravity if they lost contact at around 1h45m in a 2hr descent, maybe they were at 3000m depth (approx)? Therefore: 2

pressure in Pa = water density x depth x gravity if they lost contact at around 1h45m in a 2hr descent, maybe they were at 3000m depth (approx)? Therefore: 29341710 Pa = 997 x 3000 x 9.81 = 4255.6 lbs per square inch