What is the limiting partial pressure of oxygen for the bottom phase of a dive?

The limiting partial pressure of oxygen for the bottom phase of a dive is critically important for ensuring a diver's safety and well-being during underwater excursions. A partial pressure of 1.40 bar is recognized as the maximum safe limit for oxygen exposure at depth while diving.

Exceeding this partial pressure can result in oxygen toxicity, which can manifest as various neurological and physiological symptoms. These include visual disturbances, seizures, and other serious complications that can compromise a diver's safety and ability to respond effectively underwater. Depths where the partial pressure of oxygen approaches or exceeds this threshold require careful monitoring and adherence to diving procedures that help prevent these hazards.

Establishing a limit of 1.40 helps divers avoid these risks while ensuring they can utilize sufficient oxygen for breathing and physical demands at depth. This safety parameter is a standard practice in recreational diving, allowing divers to enjoy their experience while managing the associated risks effectively.