What is the result of a Nitrox cylinder being filled improperly?

When a Nitrox cylinder is filled improperly, particularly with an incorrect mixture of oxygen and nitrogen, it can lead to potential oxygen toxicity. This occurs when there is an elevated level of oxygen exposure beyond what is considered safe for diving. Different Nitrox mixtures have varying percentages of oxygen, and exceeding the safe limit can increase the partial pressure of oxygen to levels that may cause toxic effects, especially during deeper dives.

Understanding the relationship between depth and the partial pressure of gases is crucial in diving. The deeper a diver goes, the greater the pressure and therefore the higher the partial pressure of the gases in the mix. Oxygen toxicity can manifest in various symptoms, including visual disturbances, dizziness, and convulsions. Because of this, proper mixing and filling of Nitrox cylinders are essential to ensure safety and the effectiveness of the dive plan.

The other options, while relevant to different contexts in diving, do not directly result from improper filling of a Nitrox cylinder. Increased buoyancy, faster ascent, and reduced visibility pertain to other factors or scenarios in diving rather than being direct consequences of a cylinder being improperly filled.