A diver plans a 30-minute dive to 25 meters (82 feet). What is the no-decompression limit (NDL) for this depth according to IANTD air tables?

The no-decompression limit (NDL) represents the maximum amount of time a diver can spend at a certain depth without requiring mandatory decompression stops during ascent. For a dive to 25 meters (82 feet), the IANTD air tables provide specific NDL information that helps divers plan safe dives within certain depth and time parameters.

In this case, for a 25-meter dive, the NDL is listed as 30 minutes. This means that divers can safely spend up to 30 minutes at this depth without needing to make decompression stops when ascending. If a diver exceeds this limit, there’s an increased risk of decompression sickness, which necessitates ascension stops or additional safety measures.

Understanding NDL is crucial for dive planning to ensure that divers remain within safe limits, thus enhancing safety and enjoyment during diving activities. The given answer aligns with the recommended practices and guidelines set forth in IANTD training for enriched air diving, emphasizing the importance of adhering to established dive tables to mitigate risks associated with extended bottom times.