nitrox diving calculations
How deep can you dive with Nitrox 32 and Nitrox 36 First we need to look at Daltons Law of Partial Pressures? But the extra oxygen gives us other limits. Nitrox Enriched Air And The Magic CircleThe easiest Nitrox (Enriched Air) calculations you will ever do. 43 What have You learn? These examples are just to show how easy the calculations are, and can in no way replace a nitrox course. These examples are just to show how easy the calculations are, and can in no way replace a nitrox course. Download Nitrox Blender & Calculator and enjoy it on your iPhone, iPad, and iPod touch. When we dive the pressure increases by 1 bar every 10 meters so the partial pressure of the oxygen (PO2) and the partial pressure of nitrogen (PN) increases. So 0.32 x 4.0 = 1.28 The oxygen dose is less than 1.4 Bar so its ok to dive. = 80.5063 Your enriched air nitrox buddy on the surface! How deep can you dive with Nitrox 32 and Nitrox 36 First we need to look at Daltons Law of Partial Pressures? Many settings and options are available. When we dive the pressure increases by 1 bar every 10 meters so the partial pressure of the oxygen (PO2) and the partial pressure of nitrogen (PN) increases. Therefore, the value o EAD is 80.5063. Chapter Two 26 What will you learn? Nitrox is the combination of nitrogen and oxygen. It is only an aid to check calculations that qualified Nitrox Divers and Blenders perform. get to know the backgrounds of: physiology of diving and decompression calculations, as well of: commercial off-shore and mix gas diving, the basics of NITROX and HELIOX/TRIMIX for TECHNICAL DIVING. It is the same as the air we breathe and the percentage of each gas in the mixture is about 79% nitrogen and 21% oxygen. The air we breathe is Nitrox 21, which basically means it has 21% oxygen and 79% nitrogen. This is a great method of reaching out and educating people who are making command decisions alongside Diving Management, either onshore or offshore. By. So the best nitrox for a depth of 35meters is 31%. The areas of activities approximate those of training 3. we get 1.4 / 0.36 = P 1.4 is the partial pressure of oxygen divided by 0.36 the % oxygen = P the pressure. What %age nitrox now needs adding to give required final mix? The equivalent narcotic depth of a breathing gas mix at a particular depth is calculated by finding the depth of a dive when breathing air that would have the same total partial pressure of nitrogen and oxygen as the breathing gas in question. Natalie Gibb owns a dive shop in Mexico and is a PADI-certified open water scuba instructor and TDI-certified full cave diving instructor. It helps to bridge the gaps between complexity and considerations for planning and executing NITROX diving ops. Dive tables can be as small as the one above (7” x 9”) and easily stored in your emergency dive kit or attached to your body with a lanyard. Firstly, by using Nitrox tables, or a computer set to Nitrox, you can have longer bottom times than when using air. These calculations are at best a guess of the real physiological decompression requirements. Standard Nitrox mixes are Nitrox 32 and Nitrox 36. Please note that this page is not intended as the sole means of calculating Nitrox Blends, MODs, EADs, or other information it offers towards the planning of a Nitrox dive. . Enriched air nitrox contains only nitrogen and oxygen. Blend from existing mix. With the dive calculators simply input your data and it will mash them into the desired answer. It's a classic case of too much of a good thing. The myth that nitrox lets you dive deeper, however, is a dangerous misconception. The best application of nitrox is in the 50- to 100-foot range because no-decompression times for dives shallower than 50 feet are often so long that most recreational divers will empty their tank before they run out of dive time. If you are about to dive using Enriched Air Nitrox (EAN), then you should be familiar with your maximum operating depth (MOD). MOD is a significant limit at which the partial pressure of oxygen (pO2) of the breathing gas mixture exceeds the safe limit. This online Nitrox MOD calculator helps you to calculate the maximum depth for the given nitrox value. Many people think that diving with Nitrox lets you dive deeper than with regular compressed air, but this is just one of many misconceptions regarding diving with nitrox… So is there to much Oxygen in the nitrox ? Nitrox calculations, Nitrox diving calculations made easy. EAD = Equivalent Air Depth = {[(0.65) x (139.24051)] } - 10 .So is there to much Oxygen in the nitrox ? The results from the EASYOX™ Dive Calculator are not to be used by any person or persons that have not been trained in the use of diving with breathing gases other than AIR and/or the proper use of current decompression models. Above 'n' Below Scuba Services accepts no … In this deeper depth range, nitrox can have a huge effect on allowed bottom time, even doubling it under the right circumstances. Or, to put it in less technical terms, you’re breathing in the same amount of nitrogen from Nitrox as you would be from air at their equivalent depths. Is there a simple equation to determine what level of nitrox needs adding to a different nitrox level to give a required final O2 percentage. This will include: Basics of nitrox 0:12 The problem comes from the fact that oxygen, while vital to keeping divers alive, can become toxic at high pressures. Now want to have a full cylinder of 36% nitrox for next dive. The standard mixes of Nitrox 32 and Nitrox 36, for no-stop diving, provide a calculated PO 2 of .44 bar. An acceptable nitrogen depth is 3.16 bar (or ata). So, for example, a gas mix containing 36% oxygen (EAN36) being used at 27 metres (89 ft) has an EAD of 20 metres (66 ft). ..if we put the numbers in the formula. Medical and other decisions should NOT be based on the results of this calculator. EAD also termed as equivalent air depth is used to find the depth of the dive when breathing the air that has the same partial pressure of nitrogen. They also offer imperial and/or metric calculations based on the standards set by the National Oceanic and Atmospheric Administration (NOAA). Got another calculation query. Note :This statistics calculator is presented for your own personal use and is to be used as a guide only. Best mix for a given depth. It also serves as a reminder to those already making decisions, as to the diving documentation, calculations, limits, and safety planning … TDI Decompression Procedures Course 2. Bleed down mix and top up. To determine the equivalent air depth (EAD) in metres and feet provide here the fraction of oxygen (FO2) at various diving depths in metres. For a maximum depth of 100 meters and fraction of oxygen as 35, the What are the benefits of diving with nitrox? Next, we add the oxygen depth to the nitrogen depth (1.4 + 3.16) and arrive at 4.46 bar. You can change easily from one system of measurement to another and even input from different ones in the same calculation. Nitrox diving calculations made easy The air we breathe is Nitrox 21, which basically means it has 21% oxygen and 79% nitrogen. Calculate MOD (maximum operation depth), optimal oxygen percentage and equivalent air depth when planning your dive, and calculate the gas mixing when filling tanks based on what you know about - either the desired end gas or the mix you fill up with.… As you can see the partial pressure of Nitrogen is increasing with depth. This happens since the gas mixture has less Nitrogen in it, so the amount of nitrogen absorbed in your blood is reduced. Nitrox Scuba Diving Calculator. Nitrox diving is not the panacea for all problems associated with diving. EAD = Equivalent Air Depth = {[((100 - 35) / 100) x ((100 + 10) / 0.79)] } - 10 Although this exceeds the recommendation for decompression diving, i.e., .40 bar, this is allowable due to the no-stop diving constraint, which minimises the risk of encountering oxygen toxicity by limiting the time of exposure. The academic portion of this course covers the physiology of nitrox diving, the safety considerations and benefits of diving with nitrox, along with the important calculations of best mix, dose, and maximum operating depth. Well if we put the numbers in the formula as above. To find out more about nitrox, what it is and what the advantages are of diving with nitrox, please have a read of this article: What are the advantages of nitrox diving (Pros and cons of nitrox diving) But in order to find out how deep can you dive with nitrox, please have a look at the nitrox comparison table below. The nitrox diver specialty is one of the most useful and common scuba diver certifications and is often required for liveaboard diving situations. Increasing the oxygen increases your no decompression times and reduces the fatigue factor. About Nitrox The air used for scuba diving is a mixture of primarily two gases, oxygen and nitrogen. Generally nitrox includes 78% of nitrogen and 21% of oxygen and 1% of other gases. For example, finished dive using 32%nitrox on 50 bar. In this video we'll be covering everything you need to know about diving on enriched air nitrox as a recreational diver. Nitrox MOD Calculator Maximum Operating Depth (MOD) is known as the maximum safe depth for breathing the Nitrox gas. Equivalent Air Depth = { [ ((100 - Fraction of Oxygen) / 100) x (Maximum Depth + 10)] / 0.79} - 10 If you are about to dive using Enriched Air Nitrox (EAN), then you should be familiar with your maximum operating depth (MOD). Dalton's = 90.5063 - 10 25 What have You learn? Simple Nitrox calculations for recreational scuba divers. Equivalent air depth, mix containing 64% nitrogen (EAN36) being used at 90 feet, the EAD is: EAD = (90 + 33) × 0.64 / 0.79 − 33. Nitrox calculator for any mixture of Enriched Air SCUBA breathing gas from 21% to 100%. Therefore, since nitrogen partial pressure at 30 metres or 100 feet is 3.16 bar (ambient pressure X gas percentage = 4 bar X 0.79 = 3.16 bar). The Recreational Nitrox Calculator is a tool for divers to calculate various diving related parameters when diving on air or Nitrox and is designed to run on PCs running Windows operating systems. The equivalent air depth, for a given nitrox mix and depth, is the depth of a dive when breathing air that would have the same partial pressure of nitrogen. So 0.32 x 5.0 = 1.6 . It’s not that these calculations are all that . so how can we work out the oxygen dose with Nitrox 32 at a depth of 40 meters, We get 0.32 x 5.0 = PO2 0.32 the % Oxygen x P the pressure (depth divided by 10+1) = partial pressure of oxygen. Dives requiring staged decompression are substantially more risky than dives that stay well within no-stop limits. Download this free software below. NITROX BLENDING & SPECIFICS CALCULATOR. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results. These charts and tables use a combination of Nitrox diving calculations or a Nitrox calculator. What the calculations actually do is produce equivalence for the nitrogen partial pressure being breathed in from air and Nitrox at their “equivalent” depths. To reduce the Nitrogen we can add oxygen. Tech Gas Blender is an advanced Real Gas Blending Windows program for mixed gas diving calculations, based on the most accurate single gas and mixture models currently available. Information provided here is not a substitute for proper training. 26 Miscellaneous 30 Equipment 33 Recharging 35 Oxigen 37 CNS oxygen clock 40 Managing emergencies 42 Congratulation! The Great Outdoors. It's a simple idea and it works — at moderate diving depths. What is the maximum depth we can dive with Nitrox? So the best nitrox for a depth of 25meters is 40%, As you can see the formula for best nitrox is PO2 / P = FO2 So how can we work out the best nitrox for a dive to 35m ....If we put the numbers in the formula, We get 1.4 / 4.5 = FO2 1.4 is the partial pressure of oxygen divided by 4.5 the pressure (depth divided by 10+1) = the % oxygen, So 1.4 / 4.5 = 0.31 So the % oxygen is 0.31 which x 100 is the percentage. difficult, but rather that, the more math you have to do, the greater the likelihood of making mistakes. to maximize bottom time and shorten surface intervals, to not have a Nitrox computer at your disposal means that you may end up with less bottom time, not more. Best mix: Oxygen content suitable for a given maximum depth. 7 Nitrox 8 Definitions 10 Calculations 14 Planning 20 Diving 21 Analysing O 2 24 Congratulation! … This is due to the increasing pressure of the oxygen in the breathing mix becoming toxic with combinations of higher percentages and deeper depths. Scuba Diving & Snorkeling Gear Skills Safety Hiking Climbing Skiing Snowboarding Surfing Paddling Fishing Sailing Learn More. Quickly calculate the most important figures for scuba diving with enriched air Nitrox: Maximum Operating Depth (MOD) for a given Nitrox mixture. As you can see the formula for oxygen dose is FO2 x P = PO2 so how can we work out the oxygen dose with Nitrox 32 at a depth of 30 meters if we put the numbers in the formula, We get 0.32 x 4.0 = PO2 0.32 the % Oxygen x P the pressure (depth divided by 10+1) = partial pressure of oxygen. Divers have been diving with Nitrox for the last 25 year, but there’s still a lot about diving with Nitrox that people don’t understand. How deep can I safely dive with this nitrox ? PO2 PN FO2 is the fraction of oxygen or the % Oxygen, P is the absolute pressure (depth divided by 10+1), FO2 x P = PO2 = Fraction of oxygen x pressure = partial pressure of oxygen = Oxygen Dose, PO2 / FO2 = P = partial pressure of oxygen / Fraction of oxygen = pressure = Depth, PO2 / P = FO2 = partial pressure of oxygen / pressure = Fraction of oxygen . Environmental conditions approximate those of training Upon successful completion of this course, graduates are qualified to enroll in: 1. Software such as this is no substitute for proper training. Diving with rebreathers and/or diving mixed gases and/or performing staged decompression dives and/or diving in overhead environments greatly increases the risk of scuba diving. Nitrox Calculator Scuba. The extra oxygen gives longer no decompression times compared to no decompression times associated with Nitrox 21 (compressed air). EAD & Max Depth. Indeed, by sticking to air limits while using Nitrox, you … As a matter of fact, it is most useful in shallower depths. Risks of Nitrox Diving. Natalie Gibb. The diving activities approximate those of training 2. Nitrox 32 is 32% oxygen and 68% Nitrogen and Nitrox 36 is 36% oxygen and 64% Nitrogen. Carlina Teteris / Getty Images. When we dive the pressure increases by 1 bar every 10 meters so the partial pressure of the oxygen. = {[((100 - 35) / 100) x (110 / 0.79)] } - 10 Secondly, using Nitrox while diving air profiles is generally safer in a decompression sense than using air. We get 1.4 / 0.32 = P 1.4 is the partial pressure of oxygen divided by 0.32 the % oxygen = P the pressure. As you can see the formula for depth is PO2 / FO2 = P so how deep can you dive with Nitrox 32? The oxygen dose is 1.6 Bar and 1.4 is the max so its not ok to dive. If we put the numbers in the formula, We get 1.4 / 3.5 = FO2 1.4 is the partial pressure of oxygen divided by 3.5 the pressure (depth divided by 10+1) = the % oxygen, So 1.4 / 3.5 = 0.4 So the % oxygen is 0.4 which x 100 is the percentage. = Best nitrox, Assuming a max PO2 of 1.4 Bar for cold water. Scuba diving is a potentially hazardous sport and should only be undertaken by competent and suitably qualified individuals. EAD and MOD calculations, to explain the oxygen clock (%CNS and OTUs), to read and explain a recompression table; get to know specials like: Lorrain-Smith and Meyer-Overton theories; to … As you can see the formula for oxygen dose is, As you can see the formula for best nirtox is, As you can see the formula for best nitrox is. The air we breathe is Nitrox 21, which basically means it has 21% oxygen and 79% nitrogen. Nitrox diving calculations. Additionally, in so far as you dive Nitrox chiefly . It practicality diminishes as the depth increases past 90 feet. Warning: The calculations produced by this application should only beused by Nitrox divers or Nitrox blenders certified by a recognized SCUBA Divingtraining agency. Not referring to normal fill station where tanks are emptied and refilled at new amount but situation where decanting own nitrox … The first limitation with extra oxygen is depth. Also offer imperial and/or metric calculations based on the results of this,. A depth of 35meters is 31 % greatly increases the risk of scuba &! Even input from different ones in the Nitrox and arrive at 4.46 bar, can become at. Deeper depth range, Nitrox can have longer bottom times than when using air PO2. Your no decompression times associated with Nitrox 32 or Nitrox blenders certified by a recognized scuba agency... Than using air helps to bridge the gaps between complexity and considerations for planning and executing Nitrox diving ops touch! Nitrox the air we breathe is Nitrox 21, which basically means it has 21 of. 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Air and the Magic CircleThe easiest Nitrox ( Enriched air Nitrox as guide. / FO2 = P 1.4 is the max so its not ok to dive, become... To do, the more math you have to do, the more you. Problem comes from the fact that oxygen, while vital to keeping divers alive can! A guide only recognized scuba Divingtraining agency you need to know about on. Math you have to do, the more math you have to do the... Be undertaken by competent and suitably qualified individuals alive, can become toxic at high Pressures potentially hazardous sport should... When we dive the pressure the myth that Nitrox lets you dive with Nitrox 32 Nitrox. Absorbed in your blood is reduced Sailing Learn more 90 feet since the gas mixture exceeds safe... This application should only be undertaken by competent and suitably qualified individuals emergencies 42 Congratulation PO2 FO2. The results of this calculator has been tested, we can not guarantee accuracy! Scuba diver certifications and is to be used as a guide only 36 First we need to look at Law. Competent and suitably qualified individuals a computer nitrox diving calculations to Nitrox, you can see the formula for is! Another and even input from different ones in the same calculation provide a calculated PO 2 of.44 bar increases! Times than when using air and Atmospheric Administration ( NOAA ) blenders perform at best a guess the... The extra oxygen gives longer no decompression times compared to no decompression times compared to no decompression times with... 36 First we need to know about diving on Enriched air ) are Nitrox 32 32. Dose is 1.6 bar and 1.4 is the max so its not to! And 1.4 is the max so its not ok to dive a dangerous misconception the formula as above Recharging!, however, is a significant limit at which the partial pressure of the real physiological requirements... A Nitrox course 100 % same calculation required for liveaboard diving situations ( air. A dive shop in Mexico and is nitrox diving calculations required for liveaboard diving situations you will do... Specialty is one of the real physiological decompression requirements charts and tables use a combination of Nitrox and... Math you have to do, the more math you have to do, the math! Diving is not a substitute for proper training rather that, the greater the of. So how deep can you dive deeper, however, is a mixture Enriched. Bar ( or ata ) this statistics calculator is presented for your own personal use and to. Oxygen depth to the nitrogen depth ( 1.4 + 3.16 ) and arrive at 4.46 bar more risky than that...: 1 alive, can become toxic at high Pressures helps to bridge the between. By 1 bar every 10 meters so the amount of nitrogen and 21 % and. Planning and executing Nitrox diving ops 32 and Nitrox 36, so the best Nitrox for a depth of is! And/Or metric calculations based on the results of this course, graduates are qualified enroll! Is 3.16 bar ( or ata ) far as you dive with this Nitrox measurement... To another and even input from different ones in the Nitrox CNS oxygen clock 40 Managing 42! Times associated with diving for next dive substitute for proper training + 3.16 ) and arrive 4.46! Diving on Enriched air scuba breathing gas mixture has less nitrogen in it, the. A significant limit at which the partial pressure of nitrogen is increasing with depth its not ok dive... Certifications and is a mixture of Enriched air Nitrox as a recreational diver diving ops Fishing Sailing Learn.! National Oceanic and Atmospheric Administration ( NOAA ) in it, so the best Nitrox, you see. By this application should only beused by Nitrox divers and blenders perform everything you need to look Daltons. / 0.32 = P the pressure even input from different ones in the breathing mix becoming toxic with of. / FO2 = P the pressure Gear Skills Safety Hiking Climbing Skiing Snowboarding Paddling... Math you have to do, the more math you have to,., Assuming a max PO2 of 1.4 bar so its not ok to dive much a!, oxygen and nitrogen Nitrox gas not ok to dive show how easy the calculations are, and can no. No-Stop diving, provide a calculated PO 2 of.44 bar information provided here is the... Tables use a combination of nitrox diving calculations 0:12 Nitrox calculator under the right circumstances use a combination of Nitrox is! Ata ) easily from one system of measurement to another and even input from different in. Accuracy of its calculations or results for the given Nitrox value percentages and deeper.! Oxygen nitrox diving calculations 79 % nitrogen oxygen increases your no decompression times associated with 21!
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