PADI Divemaster Certification Practice Exam

After a dive, if a diver is in pressure group J, what is the ANDL for diving again to 43 feet?

1. 30 minutes

2. 50 minutes

3. 62 minutes

4. 80 minutes

The correct answer is: 62 minutes

To determine the Allowed No-Decompression Limit (ANDL) for a diver in pressure group J planning to dive again to a depth of 43 feet, one must refer to the appropriate dive tables or dive computer that corresponds with the no-decompression limits for recreational diving. For a diver already in pressure group J, the ANDL of 62 minutes at a depth of 43 feet is based on the physiological effects of nitrogen absorption and elimination in the body, as outlined in the dive tables. These tables are designed to provide safe limits for subsequent dives, taking into account residual nitrogen from previous dives. The ANDL indicates the maximum time a diver can spend at a certain depth without needing to perform a decompression stop upon ascent. The value of 62 minutes allows the diver sufficient time to safely explore the underwater environment while considering the previously absorbed nitrogen, effectively managing the risk of decompression sickness. Understanding these limits is crucial for divers to ensure safety, emphasizing the importance of adhering to dive tables or using a dive computer for real-time data during underwater activity. This knowledge is essential for any Divemaster in guiding safe recreational diving practices.