What is a secondary alert you should use while diving with an enriched air computer?

The maximum depth warning serves as a critical secondary alert when using an enriched air computer while diving. This alert is particularly important as it helps divers monitor their depth to ensure they remain within safe operational limits for the specific blend of enriched air they are using. These computers typically provide a maximum depth limit based on the gas mix and help prevent accidental deep dives that could lead to increased risk of nitrogen narcosis or decompression sickness.

Understanding the sea environment and the characteristics of enriched air diving means keeping within specified depths. While other alerts, such as time elapsed signals, pressure warnings, and temperature alerts, can be beneficial, they do not focus on the immediate risk associated with depth. Monitoring maximum depth is essential for safe diving practices, especially as enriched air divers might use gas blends that vary in the allowable depths compared to regular air dives, making the maximum depth warning a critical feature of the dive computer.