What should a diver do if they exceed their no-decompression limits?

When a diver exceeds their no-decompression limits, performing a mandatory decompression stop is essential for safety. The no-decompression limit is the maximum time a diver can spend at a specific depth without requiring decompression stops during ascent. Exceeding this limit increases the risk of decompression sickness, also known as "the bends," which occurs due to the formation of nitrogen bubbles in the bloodstream and tissues as a diver ascends too quickly after spending too long at depth.

By conducting a decompression stop, the diver allows for a controlled ascent where they can off-gas any excess nitrogen that may have accumulated in their body. This process helps reduce the risk of illness by allowing nitrogen to safely dissipate rather than form harmful bubbles.

In comparison, continuing to dive until feeling better, ascending quickly to the surface, and doing nothing dismiss the serious risks associated with exceeding no-decompression limits and could lead to severe health consequences. Safe diving practices emphasize the importance of adhering to established limits and protocols to protect the diver's health.