The illustration gives you an idea of this works. Before your first your body has its normal nitrogen. Upon surfacing, your nitrogen level is higher, even though , you're within the safe limits estab you're by your computer. After some time at the surface, your body some of the residual nitrogen, but not all of you can also see that you're still closer to the maximum limit that you were before your dive, so a repetitive dive will have a sorter no decompression limit. After the repetitive dive, you're still within accepted limits, but your nitrogen level has -en and includes the extra nitrogen absorbed during this dive, Am the residual nitrogen left from your first dive. The RDP d/or your dive computer helps you determine acceptable time and depth limits for your first and repetitive dives. Accounting for theoretical changes in body nitrogen.

How long you have to wait before a dive isn't a repetitive dive depends on the computer or table. A computer tracks theoretical nitrogen for varying intervals, but it isn't really important to how long because the computer accounts for it automatic

Using the RDP, if you don't plan to dive for at least six hours, the residual nitrogen has little consequence. On the other hand, if you do plan to dive within six hours, you must account for the residual nitrogen when you plan your dive - and that's part of at you're about to learn to do with the Recreational DivePlanner.