Why is it important to inform your dive buddy about the Nitrox mix used?

Informing your dive buddy about the Nitrox mix used is essential for safety during a dive. Each diver needs to be aware of the specific oxygen content of the gas they are breathing because different Nitrox mixes have varying maximum operating depths and no-decompression limits. By communicating this information, divers can help monitor each other's dive profiles and ensure that they remain safely within the limits for their particular Nitrox mix. This awareness helps to prevent the risks associated with oxygen toxicity and decompression sickness, thus enhancing the overall safety of the dive.

The other options, while they touch on aspects of diving, do not directly address the critical safety aspect linked to knowing the Nitrox mix. Understanding the mix is fundamental to maintaining safe dive practices, especially when planning dives that depend on accurate gas analysis and management.