What is a common method for controlling ascent rates during a Nitrox dive?

Using a dive computer or dive tables is a common method for controlling ascent rates during a Nitrox dive because these tools provide important information on the appropriate ascent rate based on depth and the duration of the dive. Dive computers continuously monitor the diver's depth and time spent underwater, calculating no-decompression limits and safety stops. They alert the diver when to ascend and at what rate, ensuring that the ascent is controlled and safe, minimizing the risk of decompression sickness.

Dive tables serve a similar purpose by outlining various ascent profiles based on specific depths and times, allowing divers to plan their ascents accordingly before beginning their dive. These methods are essential for safe diving practices and help divers manage their exposure to inert gases, particularly nitrogen, to avoid complications during ascent.

In contrast, holding your breath during ascent is extremely dangerous and can lead to serious injuries like lung expansion injuries. Using buoyancy compensators alone does not provide detailed information about ascent rates or decompression limits and is primarily meant for managing buoyancy, not ascent speed. Hand signals, while important for communication underwater, do not directly influence or control ascent rates.