What Is Tec Diving

Diving has come a long way since its humble beginnings as a way to gather food or explore sunken ships. Now, diving is a popular recreational activity enjoyed by people of all ages and levels of experience. But for those looking for a more extreme diving experience, there’s tec diving. Tec diving is a type of diving that goes beyond the limits of conventional diving. Tec diving generally refers to diving deeper than 40 meters/130 feet, but it can also include other types of challenging diving, such as cave diving, ice diving, and deep wreck diving. Tec diving requires more training and experience than conventional diving, as well as specialized equipment. But for those who are up for the challenge, tec diving offers an exhilarating way to explore the underwater world.

What Do Tec Divers Do?

Credit: PADI

Tec divers are technical divers who use scuba diving equipment to explore beyond the limits of recreational diving. Tec diving includes diving at depths greater than 60 feet (18 meters), using diving gases other than air, and using decompression methods other than conventional open-circuit scuba.

Using surface-supplied air or scuba equipment, inspect, repair, remove, or install equipment and structures below the surface of the water. The welder may use a variety of power and hand tools such as drills, sledgehammers, torches, and welding equipment. The table below shows the most recent top employment and wage figures. The Create customized tables section allows you to create customized tables for any industry that employs Commercial Divers. This figure is based on multiplying the hourly mean wage by the number of hours worked on a year-round, full-time basis. The annual wage for those occupations whose hourly wage is not published has been directly calculated using survey data. The location quotient, as defined by the Bureau of Labor Statistics, is a ratio of occupational employment concentration in an area to national average concentration.

How Much Do Technical Divers Make?

Commercial Divers%27s percentage in the United States is 10%.Hourly Wage $17.85$ 29.02Annual Wage (2)$ 37,130$ 60,360%

How Long Does It Take To Be A Tech Diver?

PADI TECREC 40 COURSE – 4 DAYS / 4 NIGHTS. Technical diving is the process of transitioning from recreational diving to technical diving, and the Tec 40 is the entry point. You will use fully functional twin banded tanks as part of the course, as well as carrying one stage tank to a maximum depth of 40 meters.

What Is Technical Diving Considered To Be?

The term technical dive refers to dives that are deeper than 130 feet (40 meters) or in an overhead environment where the dive does not directly involve the surface or natural light. Some of these environments may have fresh or saltwater caves as well as shipwrecks’ interiors.

How Deep Can A Technical Diver Dive?

Credit: howtodivescuba.com

The maximum depth recommended for conventional diving is 130 feet, but technical divers may go as deep as 170 feet or even deeper.

Deep sea detectives were diving a 240-foot-deep wreck when they saw them. How many days you will be allowed to dive with air, nitrox, or a rebreather before you are banned from scuba diving? Dan CHatterton was diving on a rebreather. Another man used Trimix instead of the other person. Nowadays, the majority of technical divers recommend not diving below 100 feet (or 185 meters) of water. Make sure you have a rebreather on hand. If you want to get deep, you should use Trimix.

The current world record is around 1,000 feet. This isn’t an expression of excitement or even the desire to dive deep. The business requires months of planning, a large number of people, training, and funds. Divers can dive to depths previously unreached by rebreathers in the open circuit scuba pool. The maximum depth for most teams diving on open-circuit scuba wrecks would be between 200 and 400 feet. Rebreathers, on the other hand, are completely different from everything else. Divers who use rebreather machines are less likely to need to be present at depths greater than 400′ on a regular basis, so they can dive further than 400′ on a more routine basis.

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It was an honor and a privilege to dive with these incredible individuals, led by world record holder and Egyptian diving legendAhmed Gabr. Despite the fact that the dive was risky, the results were astounding. We will gain valuable information about the deep sea’s conditions below 330 meters (1,100 feet) thanks to the dive. Divers should always make safety stops while diving below this depth because there is a greater risk of decompression sickness at this depth than at any other.

Technical Divers: A Closer Look At The Ocean’s Underworld

Divers who specialize in deeper diving, such as those who are certified as scuba divers, can get a bird’s-eye view of the ocean’s underworld with specialized equipment and training. PADI divers can dive into depths of 100 feet or more if they are certified as Open Water or Advanced Open Water. The breathtaking scenery of some areas of the ocean is more dramatic than in others, and underwater explorers will discover amazing things to see at different depths. Divers can spend up to an hour submerged depending on their experience and equipment. Divers who specialize in diving at deeper depths are a small percentage of all recreational divers, but their skills and equipment are in high demand. Divers are estimated to have trained approximately 4% to 12% of the total population.

Padi Tec Diving

Padi tec diving is a branch of diving that includes all the technical aspects of diving, such as using rebreathers, diving deeper than 60 feet, and using mixed gases. Padi tec diving is an advanced form of diving that requires special training and certification.

What Is Padi Tec Dive?

Diving with technical equipment allows you to go beyond the recreational “no stop” rule. You can plan longer dives at deeper depths or at more advanced locations by using this method.

How Deep Can You Tec Dive?

Although conventional scuba diving is recommended for 130 feet of depth, technical divers can dive up to 170 feet to 350 feet.

How Do You Become A Tech Diver?

Before taking the technical diving course, you must have previously completed at least one of the PADI Advanced Open Water Diver certificate, the PADI Enriched Air Diver certificate, the PADI Deep Diver certificate, or a proof of at least 10 dives to 30 meters/100 feet.

Technical Diving

Technical diving is a type of diving that requires special training and equipment. It is used to access places that are not possible to reach with traditional diving equipment and techniques. Technical diving is often used in exploration, search and rescue, and scientific research.

The PADI Deep Diver Speciality certification limits certified divers and dive professionals to a maximum depth of 40 meters. Divers who specialize in diving deep enough to use a different breathing gas per depth than recreational scuba divers do so as well. You must be focused, aware, responsible, and courageous in order to participate in technical diving. People who participate in the PADI Discover Scuba Diver program will have the opportunity to try scuba diving for the first time before committing to a course. You can also take part in aTry Technical Diving course as an alternative to the Try Technical Diving course. Tec Basics will teach you everything you need to know about technical diving. This course teaches you how to operate three cylinders, plan dives, calculate gas requirements, and much more in addition to two pool sessions and two open water dives. Two Fish Tech, a PADI and TDI training center located in Amed, Bali, offers diver-specific technical support as well as TDI and PADI diver-specific courses.

Maximum Operating Depth (MOD) and Scuba Diving

Natalie Gibb owns a dive shop in Mexico and is a PADI-certified open water scuba instructor and TDI-certified full cave diving instructor.

Scuba Diving Tanks Containing Enriched Air Nitrox

Carlina Teteris / Getty Images

A maximum operating depth (MOD) is a depth limit based on the percentage of oxygen in a diver’s breathing gas.

Why Should a Diver Calculate a Maximum Operating Depth?

Breathing high concentrations of oxygen can cause oxygen toxicity, which is usually fatal when diving. The concentration (or partial pressure) of oxygen in a diver’s breathing gas increases with depth. The higher the percentage of oxygen, the shallower the depth at which it becomes toxic. Divers calculate a MOD to be sure that they do not descend beyond the depth at which the oxygen in their tank may become toxic.

Should I Calculate My Mod on Every Dive?

A diver should calculate the MOD for his dive whenever he uses enriched air nitrox, trimix or pure oxygen. Technical divers who engage in deep air diving must also calculate MODs. A scuba diver who breathes air and who remains within recreational dive limits need not calculate a MOD for his dive. In fact, on most recreational dives the maximum depth will be limited by factors such as the no-decompression limit, narcosis, and the experience level of the diver instead of the MOD.

How to Calculate a Maximum Operating Depth

Determine Your Oxygen Percentage:

If you are diving on air, the percentage of oxygen in your tank is 20.9 %. If you are using enriched air nitrox or trimix, use an oxygen analyzer to determine the percentage of oxygen in your scuba tank.

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Determine Your Maximum Partial Pressure of Oxygen:

Most scuba training organizations recommend that divers limit the partial pressure of oxygen for a dive to 1.4 ata. A diver may choose to lower or raise this number depending upon the type of diving and the purpose of the breathing gas. In technical diving, for example, pure oxygen is frequently used at partial pressures higher than 1.4 ata for decompression stops.

Calculate Your Maximum Operating Depth Using This Formula:


Calculate the MOD for a diver breathing 32% oxygen who plans to dive to a maximum oxygen partial pressure of 1.4 ata.

• Step one: substitute the appropriate numbers into the formula.

• Step two: do the simple arithmetic.

• In this case, round the 0.5 decimal down, not up, to be conservative.

111 feet is the MOD

Cheat Sheet of Maximum Operating Depths for Common Breathing Gasses

Here are some MOD’s for common breathing gasses using a partial pressure of oxygen of 1.4 ata:

Air . . . . . . . . . . . 21% Oxygen . . . . MOD 187 feet
Nitrox 32. . . . . . 32% Oxygen . . . . MOD 111 feet
Nitrox 36. . . . . . 36% Oxygen . . . . MOD 95 feet
Pure Oxygen . . 100% Oxygen . . . MOD 13 feet

Putting a Maximum Operating Depth Into Use

While understanding how to calculate a MOD is great, a diver must also make sure that he stays above his depth limit during a dive. One good way for a diver to ensure that he does not exceed his MOD is to use a dive computer that can be programmed for nitrox or mixed gasses. Most computers are programmed to beep or otherwise notify the diver if he exceeds his MOD or partial pressure limits.

In addition, a diver using enriched air or other mixed gasses should label his tank with the MOD of the gas inside. If the diver accidentally exceeds the MOD written on his tank, his buddy may notice the written MOD and alert him. Writing the MOD on the tank, along with other information about the gas the tank contains, also helps to prevent a diver from mistaking the tank for one filled with air.

Now you can calculate a maximum operating depth for a breathing gas containing any percentage of oxygen. Safe diving!

Scuba Diving Depth for Beginners (+Why There Are Limits)

Just like anything in life, you’ll have to take it slow while learning to scuba dive. No one’s expecting you to descend to 40 meters (130 feet) on your first dive!

Don’t worry – beginner scuba divers can safely dive down to depths of 18 meters (60 feet) or more, which is one of the most common depths for many a dive site.

Light also drops as you descend, the water preventing the sun’s rays from getting to you. This can trigger some fears and claustrophobia, not quite what you want on your first dive!

Beginner scuba divers should stick to shallower depth limits and focus on getting your scuba skills up to par before venturing into deeper waters.

scuba diving in shallow water

In addition, deep diving is a specialized skill that requires additional training and experience in the form of the Advanced Open Water Diver course or one of the deep diving specialty courses. As you progress and gain more experience, then you can think to dive to deeper depths.

What Happens If You Exceed The Limit For Recreational Diving

If you are lucky, nothing. Many divers accidentally exceed the maximum depth but don’t show any symptoms of dive injuries. However, always monitor your depth through your dive computer or depth gauge to make sure you are within recreational diving limits.

Submersible pressure gauge

Oxygen Toxicity

Oxygen toxicity is when you’re breathing too much oxygen, usually at deeper depths. It can happen suddenly and without warning, and cause convulsions, blurred vision, dizziness, and trouble breathing.

The partial pressure of oxygen, or total amount you’re breathing in, doubles every 10 meters (33 feet) you descend. When you get to a certain depth, it leaves you vulnerable to toxicity which can be dangerous, even fatal.

Nitrogen Narcosis

This happens on dives of about 30 meters (130 feet) or more. It feels like you are drunk! You might get woozy in the head and be prone to doing stupid things like taking off your scuba equipment or regulator. We once had a student start cycling underwater!

Decompression Sickness

Too much time at a deeper depth also puts you susceptible to DCS. The increased pressure can cause nitrogen to be forced into your body, expanding as you ascend and causing often severe injury, especially if you dive regularly.

‍♂️ Recreational Scuba Diving Limits

Let’s take a look at the depth limits for the beginner scuba diver.

The depth limits you have to adhere to depend on whether you are scuba certified or not. In addition, some dive shops have a limit for recreational scuba divers of 30 meters (95 feet), while others are of 42 meters (130 feet) for those with a special certification.



Non-certified beginner divers can try scuba diving by taking an introductory course, such as PADI’s Discover Scuba Diving or SSI’s Try Scuba. These “try diving” type courses have depth limitations of 12 meters (40 feet).

Courses are typically a day long and will take you through the very basic scuba skills like mask clearing and regulator recovery that are essential to every scuba diver.

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Group of scuba divers

The minimum age to take a Discover Scuba course is 10 years. If the child is from 8 to 10 years, he or she can be enrolled in PADI’s Bubblemaker program, which allows young children to try diving at a maximum depth of 2 meters.


Anyone interested in learning to scuba dive can enroll in an basic scuba certification course, such as PADI Open Water Diver, SSI Open Water Diver, NAUI Scuba Dive.

For example, the PADI open water diver certification course begins with theory, then progresses on to scuba diving in a swimming pool, and finally, to four open water divers.

The first two dives takes place at a maximum depth of 12m (40 feet), but you dive deeper on the final two dives at a maximum depth of 18m (60 feet).

Any advanced open water diver training should cover depths of up to 30 or 40 meters (95 to 130 feet) depending on the training agency.

Certified Scuba Divers

Certified Adult Diver

Open Water Divers have limits of 18m (60 feet) while Advanced Open Water are to 30m (95 feet) or 40m (130 feet) if they take any deep dive specialty courses.

Registering in a scuba diving school

Certified Kid

Junior Open Water Divers can dive to 12 meters (40 feet) if between 10 to 12 years, and 18 meters (60 feet) from 12 to 15 years.

An Advanced Junior Open Water Diver can dive to 21 meters (70 feet) between the ages of 12 to 14 and up to 30 meters (130 feet) upon turning 15 years old.

Maximum Depth Limit For Different Scuba Training Agencies

These limits may vary from different parts of the globe, local regulations, and scuba diving organizations.

While PADI and SSI are the most well-known, other scuba diving organizations such as BSAC, RAID, NAUI, and others have their own Open Water scuba certification and different depth limitations.

Scuba Dive Depth Limit For Other Agencies

  • The BSAC (British Sub Aqua Club) restriction for Ocean Divers is 20 meters (65 ft).
  • The depth restriction for RAID Open Water is 20 meters (65 feet).
  • The NAUI (National Association of Underwater Instructors) allows up to 18 meters (60 feet).
  • The 1 Star Diver restriction set by the CMAS (Confédération Mondiale des Activités Subaquatiques) is 20 meters (65 feet).
  • The maximum depth for an SDI (Scuba Diving International) Open Water Scuba Diver is 18 meters (60 feet).

✅ The Importance Of The Depth Limit

Remember on of the scuba rules, “dive within your limits”? The industry standard depth limit is there for a reason.

When the regulations are followed, scuba diving is a fairly safe activity. However, scuba diving can be a dangerous sport if you decide to get ambitious and go against your dive training and experience.

As you go deeper, the water pressure increases, when water pressure increases the risk of oxygen toxicity also increases.

The consequences of oxygen poisoning may not appear right away and will vary depending on the situation. This is one of the scuba diving injuries that are preventable by following your depth limit.

beginner scuba diving depth limits

Depth is vital in scuba diving since the deeper you go, the more aspects you must consider. While not exhaustive, deep diving comes with associated risks, like:

  • More air is used when you are diving deeper, meaning you’ll have to plan your air consumption much more carefully to accommodate for the time it takes to ascend slowly and get back to the surface
  • Because there is more pressure, you will be absorbing more nitrogen in your body and tissues the deeper your dive go, leaving you more vulnerable to DCS
  • You will have a higher chance of getting nitrogen narcosis as you dive deeper or beyond 25 meters or 80 feet
  • Your BCD or buoyancy control device’s lift will vary significantly during your dive and you’ll have to constantly adjust it to compensate for the pressure changes
  • In deeper water, you’ll lose light and might feel a little uncomfortable as the world turns less bright and loses colors

Popular diving sites around the world have more common depths of 15 to 25 meters. Why do you think? Because shallower depths can be so much fun! Colors are brighter, the sun rays can still illuminate the underwater world and you can have a blast with less associated risks.

Final Thoughts On Dive Depth Limits

To reiterate, limits are there for a reason. They are there to keep your safe and for you to always dive within your comfort zone, training, and diving experience. If you want greater depths, take your Advanced Open Water Course and gain the necessary training and thorough knowledge to do deep dives.

Speak to your scuba instructor or local dive shop about how to start diving or further your diver training. Stay safe out there and happy bubbles!

About The Author

Julie Young

Julie is the owner of OceanTrust.org, an avid scuba diver and ocean conservationist. Since a young age she has been obsessed with the ocean. Growing up in Florida. [Read Full Bio]

Source https://www.desertdivers.com/what-is-tec-diving/

Source https://www.tripsavvy.com/maximum-operating-depth-mod-2962826

Source https://oceantrust.org/scuba-diving-depth-for-beginners/

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