What is the pressure of a bailout cylinder at 42 degrees Fahrenheit?

To determine the correct pressure of a bailout cylinder at 42 degrees Fahrenheit, it's helpful to consider the relationship between temperature and pressure in gas cylinders, specifically those containing compressed air or gas.

A bailout cylinder is typically filled with compressed gas at standard conditions, which is often at 70 degrees Fahrenheit, where the pressure is usually around 3000 psi for standard diving operations. However, pressure inside a gas cylinder is affected by temperature due to the gas law principles, specifically Gay-Lussac's law, which states that the pressure of a gas is directly proportional to its absolute temperature.

At lower temperatures, such as 42 degrees Fahrenheit, you would expect the pressure to decrease somewhat from the standard pressure at 70 degrees Fahrenheit. The pressure typically decreases by approximately 1 psi for every degree Fahrenheit less than the standard temperature. Hence, as the temperature drops from 70 degrees to 42 degrees, the pressure could be expected to drop accordingly.

Calculating the exact pressure at 42 degrees involves using the relationship between the temperature and pressure of the gas, but in standard diving practice, the pressure at 42 degrees Fahrenheit is often approximated to be in the range of something very close to, but slightly less than, the standard pressure of 300