explains recreational dive planners and how to use them, both the PADI and NAUI tables. NAUI Dive Tables Objectives • Describe the function of the dive tables. • Define common dive tables terminology and concepts. • Explain the function and use of . Need a NAUI dive table? Here is one you can look at and print out! To download a larger image of this table click on the photo below. At the next page click on.
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It takes dove than 1 business da Details. Let’s say you do that first 35 minute 60 foot dive, ending up in Pressure Group N, and then want to see another dive site that’s 50 feet down and you’d like to explore for 40 minutes. So on your second dive to 50 feet, you still have as much nitrogen in your system as you’d absorb in 56 minutes down there.
NAUI Dive Tables
Table 2 shows what Letter Group you will be in after a certain ” surface interval ,” i. You can also see, though, how important it is to work this out ahead of time. Light up your dive, or use it as a constant source of brightness for underwater photos and videos! The newest thick wall dSLR housing is probably the safest enclosure money can buy, and provides optical capabilities equal to anythin Details. The depths are listed down the left side meters and feet and possible dive times are listed to the left of each depth.
Your Cart Shopping Cart Items: You use this table to find your new letter and move on to Table 3. MDTs are the circled for each depth – these are the times that you should not exceed. The tables have been around for about a hundred years and are all based on data originally developed by the United States Navy.
It features a rotating degree bezel with click stops and direct and reciprocal index points. However, understanding dive tables helps you understand the reason behind the numbers the computer displays.
Since the pressure under water is considerably higher than above water, our body absorbs more nitrogen when diving, and ever more so the deeper we dive. This table gives you the letter group designation you will be at by the finish of the dive listed along the bottomas well as providing the Maximum Dive Time MDT for depths between 40 and feet.
NAUI Dive Tables
It seems inconceivable that they’d ever understand them, let alone become proficient in using them. It’s like driving a car where the gas is on the left and the brake on the right, and one calls the gas “accelerator” and the other “velocity increasing accentuator”.
Miflex Xtreme Low Pressure Braided Regulator Hoses feature an external nylon safety braiding designed to resist the snags and abrasions that divers can often encounter. Now you have to wait 1: The package is an educational system that includes: You rested, and you have your new letter group.
Ikelite video housings tablrs corrosion resistant and exceptionally strong for proven trouble-free performance.
Then we look at the cell where column I intersects with the 50 feet row. After your first dive you are in a certain Letter Group, as tabled in Table 1. All Ikelite video housi Details. As we come back up, the pressure decreases, the fluids in our body can carry less absorbed gas, and the nitrogen gets expelled from the tissues again. Go to Table 1 and fill in that information.
Tzbles top number is your residual nitrogen time. Ikelite Underwater Camera Housing Details. Okay, some quick definitions. How to plan for the second dive So let’s see how we use the tables to plan the second dive after our tablrs minute stay at 60 tales. That number of minutes is used to find the letter Group after your next dive.
Dive table assumptions The standard recreational dive planners from all certifying agencies all make pretty much the same assumptions. After your first dive you are in a certain Pressure Group, as shown in Table 1. As stated above, recreational dive planners are for “no-decompression” diving. Well, if the table says your residual nitrogen time is 20 minutes for a given depth, then you can stay at that depth 20 minutes less than on your first dive because, after all, you already absorbed that much nitrogen and it still is in your system.
Now move left to Table 3. They tell you how long you can stay, maximum, at certain depths and then come straight back up, without any decompression stops. As you can see, the deeper you go, the less time jaui get to spend down there – safely, anyway, and that is the goal of SCUBA diving. Instead the braiding is tightly tabpes and fixed to the hose core by stainless steel or brass sleeve.
How ttables use the dive tables Now what do Dive Tables do? Dive computers, which have been around since the s, do the same thing as dive tables. So what the Dive Tables do is determine how much extra nitrogen is still in your body after a dive, and then convert that into ” Residual Nitrogen Time ,” or ” RNT. What does that mean? As stated above, although you only stayed for 20 minutes at 50 feet on the second dive, you need tabpes add the 56 minutes of residual nitrogen you still had in your system, i.
How long would you have to wait on the surface? This is the table divs will tell you. Capture more of the scene by adding the Ikelite W20 Wide Angle lens to your underwater video housing. So, even if you made 7 dives in one day, if you wait 24 hours, it’s like they never happened.
Naui dive tables
Some dive computers are “air integrated,” which means they know the air pressure in the tank and can calculate remaining air time based on depth, current consumption rate and remaining pressure. Follow row B to the right to Table 2 where it intersects with column G. Find where column E intersects with the 50 foot depth row and you find that your residual nitrogen time is now 21 minutes and your new adjusted no-decompression limit is now 59 minutes.
So now your worksheet should look like this: