What is the maximum operating depth for EAN32?

The maximum operating depth for EAN32, which is a blend of 32% oxygen and 68% nitrogen, is approximately 34 meters (112 feet). This depth is determined based on the partial pressure of oxygen that divers can safely breathe. For recreational diving, the generally accepted limit for the partial pressure of oxygen is 1.4 atmospheres.

To calculate the maximum depth, divers use the formula:

Maximum Depth (in meters) = (Maximum Partial Pressure of Oxygen / Fraction of Oxygen) - 10

Substituting the values for EAN32:

Maximum Depth = (1.4 / 0.32) - 10 ≈ 34 meters.

At this depth, the oxygen levels remain within safe limits, reducing the risk of oxygen toxicity while allowing for extended bottom times compared to air. Therefore, this answer reflects the appropriate limits for safe diving with EAN32. Other depths mentioned do not align with the calculations based on safe partial pressures for diving with nitrox.