After conducting a series of dives, how is the maximum allowable bottom time for a third dive determined?

The maximum allowable bottom time for a third dive is determined by referring to dive tables for three consecutive dives. Dive tables are specifically designed to help divers understand how their previous dives impact their subsequent dives by accounting for residual nitrogen in the body. These tables indicate the maximum allowable time for various depths, taking into consideration the surface intervals and the cumulative exposure to pressure.

Using dive tables helps divers effectively plan their dives while minimizing the risk of decompression sickness. Each dive contributes to the body's nitrogen load, and the tables are constructed to ensure that the diver remains within safe limits. Therefore, consulting the dive table enables the diver to accurately determine the maximum bottom time for continuing dives based on the specifics of prior dives.