What should a diver do if they suspect their gas mixture is incorrect?

When a diver suspects that their gas mixture is incorrect, the most appropriate action is to abort the dive and analyze the gas composition. This choice prioritizes safety and ensures that the diver does not expose themselves to potential hazards associated with diving on an incorrect gas mix.

Using an incorrect blend, especially with enriched air nitrox, can lead to issues such as oxygen toxicity or inadequate breathing gas, both of which are dangerous underwater. By aborting the dive, the diver can return to a safe environment where they can accurately analyze the gas mixture with the appropriate tools or instruments. This step is crucial because only by confirming the composition of the gas can the diver appropriately address any concerns regarding safety and dive planning.

Continuing the dive cautiously or increasing the depth could lead to serious health risks. Switching to a different gas mixture could also be problematic if the diver has not planned for that alternative blend. Analyzing the gas before making any further decisions is the correct course of action to ensure a safe diving experience.