What precaution should be taken regarding aircraft oxygen systems?

Smoking poses a significant safety hazard when using oxygen systems, especially in an enclosed environment like an aircraft. Oxygen supports combustion, which means that the presence of oxygen can cause even a small spark from a cigarette to ignite and lead to a fire or explosion. Therefore, prohibiting smoking near portable oxygen systems is a critical safety measure.

Aside from the dangers of smoking, there are also precautions regarding the type of oxygen used and altitude considerations. Certain types of oxygen, like industrial oxygen, can be contaminated with impurities that are harmful to health, which is why ensuring proper types of oxygen are utilized is essential. Additionally, the use of oxygen might be necessary above certain altitudes to prevent hypoxia, so there are specific regulations to follow as altitude increases. However, the primary safety precaution concerning smoking is straightforward and vital for ensuring the safety of all onboard.