Chapter 5- Decompression, Dive Tables, and Dive Computers Decompression, Dive Tables, and Dive Computers 133 : : : : : : : : Planning Your Dive To plan your dive with your NAUI Dive Planning Worksheet (figure 5-12), use the following steps: 1. Write your planned depth on the top line of the left side of the first profile. For example, plan a dive to 21 meters (70 feet). 2. Write your planned depth plus three meters (10 feet) on the lower line to the left side of the first profile. For example, your planned depth plus 3 meters (10 feet) is 24 meters (80 feet). 3. Look at Table 1 and find the MDT for your planned depth. For example, the MDT for 21 meters (70 feet) is 45 minutes. 4. Record the MDT next to your planned depth on the first profile. 5. Find the MDT for your planned depth plus 3 meters (10 feet). For example, the MDT for 24 meters (80 feet) is 35 minutes. 6. Record the MDT next to your planned depth plus 3 meters (10 feet) on the first profile. At this point, you have finished planning your dive with regard to depth and time limits. Now it’s time to dive your plan. Finding Your Letter Group The next step using your NAUI Dive Planning Worksheet is to record the information from your first dive and find your Letter Group designation (figure 5-13). Use the following steps to find your Letter Group: 1. In the time slot at the upper left corner of the first profile, record the time that you started your descent. For example, your first dive started at 9:45 a.m. 2. On the line to the lower right side of the first profile, record your deepest depth. For example, you went to 20 meters (66 feet). 3. In the time slot at the upper right corner of the first profile, record the time you completed your ascent. For example, you surfaced at 10:20 a.m. : : : MDT= 45 MDT= 35 RNT = 0 ADT = TNT = 21(70) 24(80) FIGURE 5-12. THIS PROFILE HAS BEEN COMPLETED FOR A DIVE PLANNED TO 21 METERS (70 FEET). MDT = MDT = RNT = 0 ADT = TNT = AMDT = AMDT = RNT = ADT = TNT = AMDT = AMDT = RNT = ADT = TNT = FIGURE 5-11. THE NAUI DIVE PLANNING WORKSHEET PROVIDES AN EASY WAY TO KEEP TRACK OF YOUR DIVES.
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