What are no decompression time limits?

No decompression time limits (NDLs) refer to the maximum time a diver can spend at a specific depth without requiring decompression stops during ascent. Exceeding these limits increases the risk of decompression sickness, or "the bends," due to nitrogen bubbles forming in the body. NDLs are determined based on factors like depth, dive profile, and individual dive tables or dive computers, which provide guidelines to ensure safe ascent. Adhering to NDLs is crucial for maintaining diver safety and minimizing the risks associated with prolonged exposure to pressure underwater.