What is the significance of the 'no-decompression limit' (NDL)?

The 'no-decompression limit' (NDL) is crucial for divers as it defines the maximum amount of time a diver can safely spend at a specific depth without requiring staged safety stops during ascent. This concept is essential in decompression theory, which helps prevent decompression sickness (also known as "the bends"). When a diver remains below the NDL for too long, nitrogen absorbed in the body tissues during the dive could form bubbles upon ascent if not properly managed with decompression stops. By adhering to NDLs, divers can ascend directly to the surface without the additional safety protocols that would be required if they exceed the limit.

Understanding NDLs is vital for planning dives, as they help divers manage their time underwater, ensuring both safety and efficiency in their diving activities. Thus, adherence to NDL not only enhances safety but also increases the diver's ability to maximize their dive time at the desired depth.