The PADI Recreational Dive Planner (RDP) is a tool used to calculate no-decompression limits (NDLs) for single and repetitive scuba dives. Unlike tables designed for commercial or military diving, the RDP was specifically engineered for recreational, no-stop diving.
Also located on the front side, this table calculates how much nitrogen leaves your body while you relax on the boat or shore.
remains the gold standard for understanding nitrogen management. While most of us rely on dive computers today, knowing how to use the metric RDP table
The PADI RDP consists of two sides containing three interconnected tables. Each table serves a distinct purpose in tracking residual nitrogen. Table 1: No Decompression Limits and Pressure Group Chart Padi Rdp Table Metric Pdf
The PADI Recreational Dive Planner (RDP) is a tool used to calculate the amount of nitrogen your body absorbs during a dive. The metric version uses for depth and minutes for time, making it the standard tool for international divers outside of the United States (where imperial feet are used).
Recreational scuba diving requires a solid understanding of dive theory to ensure safety under pressure. At the core of this knowledge is the PADI Recreational Dive Planner (RDP). While modern dive computers have largely taken over real-time tracking, mastering the PADI RDP Table Metric PDF remains a foundational skill for every certified diver.
The Ultimate Guide to the PADI RDP Table Metric PDF: Mastering Recreational Dive Planning The PADI Recreational Dive Planner (RDP) is a
Always perform a safety stop for 3 minutes at 5 meters at the end of every dive, even if the table says you are well within the no-decompression limits.
Example : A dive to 18 meters for 30 minutes. According to Table 1, after 30 minutes at 18m, you would be in Pressure Group .
– Gives the Adjusted No-Decompression Limit (ANDL) and Residual Nitrogen Time (RNT) for subsequent dives based on your current Pressure Group. Critical Rules for Use Table 1: No Decompression Limits and Pressure Group
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Depths (in meters) run down the left column. Bottom times run across the rows.
The final number at the bottom of each column represents the No Decompression Limit (NDL) . This is the absolute maximum time you can spend at that depth without requiring mandatory decompression stops during ascent. Table 2: Surface Interval Credit Table
In an age of dive computers, some divers question the relevance of the RDP table. However, PADI training materials emphasize that understanding the table helps divers grasp the concepts of residual nitrogen, no-decompression limits, and dive planning in a way that a computer's automatic calculations cannot teach. Moreover, the eRDPML (electronic version) and the paper table sometimes produce different results due to rounding; the table is more conservative, making it a valuable backup tool.
Look straight down from the 30-minute block to find your Pressure Group letter. Result: For 18m at 30 minutes, you are in . Step 2: Calculate Nitrogen Loss During the Surface Interval
