Abyss Scuba Diving

Divers Air Consumption: A Secret To Improve Sac Rate By 30%


Divers Air Consumption: A Secret to Improve SAC Rate

I'm constantly seeking exciting new technologies and innovative techniques to enhance our incredible underwater adventures. Today, I'm thrilled to dive into a captivating topic: the Surface Air Consumption (SAC) rate. This vital metric measures the air a diver consumes while exploring the ocean's depths. And guess what? I've got some thrilling news to share! Introducing the revolutionary Avelo Dive System, a groundbreaking technology that can potentially improve the surface air consumption rate (SAC Rate) by an astounding 30%. With its cutting-edge features and state-of-the-art design, the Avelo Dive System is set to revolutionize how we explore and experience the underwater world. Get ready to take your underwater adventures to new depths of excitement and efficiency!

Getting to Know Your SAC Rate

First, let's take a moment to understand the Surface Air Consumption (SAC rate). It refers to the air you consume while diving at the surface, usually measured in litres per minute (l/min) or cubic feet per minute (ft³/min).

You might ask why this measurement is important. Well, your SAC rate directly impacts your overall diving performance and duration. The lower your SAC rate, the longer you can comfortably stay underwater, allowing for more immersive and enjoyable dives.

By improving your SAC rate through proper breathing techniques and efficient air management, you can significantly extend your dive times and make the most out of every underwater adventure. So, take the time to master your breathing and enhance your diving experience to new depths!

The Problem of High Air Consumption Rates

High air consumption rates, commonly referred to as high SAC rates, have been a persistent and daunting challenge for divers. The detrimental effects of these elevated rates extend beyond just shorter dive times caused by increased air consumption. Divers also face a mental burden as they constantly vigilantly monitor their air supply, adding an extra layer of stress to their underwater experience. Furthermore, elevated SAC rates can contribute to higher uptakes of Nitrogen, which in turn escalates the risk of decompression sickness (DCS). This condition, characterized by the release of dissolved gases from the bloodstream as a result of ascending too quickly, can lead to severe health complications and requires meticulous attention to safety protocols. Thus, understanding and effectively managing SAC rates is crucial for divers to ensure a safe and enjoyable underwater adventure.

Factors Influencing Your SAC Rate

Relaxing is important for air consumption

Multiple factors can impact your Surface Air Consumption (SAC rate). These include physical fitness, lung capacity, depth and pressure, breathing technique, water temperature, equipment configuration and fit, as well as stress and anxiety levels. Essentially, anything that affects your breathing can influence your SAC rate.

  • Physical fitness and lung capacity: These factors directly influence the amount of air you can intake with each breath, thereby affecting your SAC rate.
  • Water temperature: Cold water can elevate your SAC rate as your body tries to generate more heat.
  • Improved hydrodynamics (drag reduction): Utilizing streamlined equipment and maintaining optimal body positioning in the water can reduce resistance and enhance breathing efficiency, resulting in a lower SAC rate.
  • Breathing technique: Proper breathing techniques can optimize air consumption and reduce the SAC rate.
  • Mental contribution: Mental focus and relaxation techniques can help regulate breathing and contribute to a lower SAC rate. Psychological factors like stress and anxiety can elevate breathing rates and SAC rates, even in calm conditions.
  • Buoyancy control: When divers maintain stable buoyancy control, they don't have to rely on their lungs to make small buoyancy adjustments as they change depth. This reduces the strain on the diaphragm and leads to a lower SAC rate. So basically, it's less work and more comfort underwater.

The challenge for most divers lies in managing these factors to maintain a low SAC rate. Enter the Avelo Dive System, our high-tech hero that can significantly improve air consumption by approximately 30%, depending on the diver.

Introducing the Avelo Dive System

Introducing the Avelo Dive System

The Avelo Dive System represents a groundbreaking advancement in scuba diving technology. It incorporates a host of features that aim to enhance divers' air management and reduce their SAC rate. These include stable neutral buoyancy, improved hydrodynamics, reduced mental strain, and an enhanced breathing technique through the Avelo mode on dive computers.

One of the standout features of the Avelo Dive System is the Hydrotank. This lightweight scuba tank integrates an air bladder, eliminating the need for a separate buoyancy compensator. Additionally, it seamlessly integrates buoyancy control directly into the air tank, ensuring smoother and more comfortable dives. To use the Avelo system, don the Hydrotank and harness, and you're ready to dive. No inflation or deflation of a BCD is necessary. To descend, add water to the Hydrotank until neutral buoyancy is achieved, allowing for effortless swimming downward without buoyancy changes at different depths.

As an avid diving enthusiast, you constantly seek gear to enrich your underwater adventures. The Avelo Dive System surpasses expectations by offering nine remarkable advantages over traditional scuba gear:

  1. Experience Weightlessness: With its integrated buoyancy control, the Avelo system grants you the sensation of floating in space, free from the constraints of gravity. It's akin to being an astronaut but beneath the waves!
  2. Blend of Freediving and Scuba: Avelo provides the thrill of freediving with the added safety of an air supply. It's a unique way to explore the ocean depths, combining the best of both diving worlds.
  3. Light as a Bubble: The Hydrotank in the Avelo system weighs approximately 6 kg less than traditional systems, resulting in a total weight reduction of around 14 kg. This not only enhances your diving enjoyment but also reduces fatigue.
  4. Simplified Neutral Buoyancy: Maintaining neutral buoyancy becomes effortless with Avelo. By utilizing water as a weighting agent it minimizes the need for constant adjustments with your buoyancy control device (BCD), allowing for more time to relish your dive.
  5. No More Slipping Tanks: Thanks to Avelo's ingenious harness system, the tank remains securely in place, eliminating the risk of tanks slipping, a common issue with traditional scuba systems.
  6. Head-Strike Free Diving: With Avelo's first-stage regulator mounted in reverse, the discomfort of head strikes becomes a thing of the past. Dive with confidence, knowing you're safe from accidental bumps.
  7. Streamlined and Efficient: With its sleek design, Avelo enhances your underwater performance, facilitating easier and more efficient movement through the water. Glide through the ocean like a dolphin!
  8. Comfortable Carry: Inspired by hiking technology, the Avelo backpack and harness provide easy and comfortable gear transportation. Bid farewell to the strain of lugging around heavy equipment.

The Avelo Dive System isn't just a piece of equipment; it's a revolution in diving technology that enhances your underwater experience. So why wait? Dive smarter, dive longer, dive with Avelo. See for yourself the incredible advantages it offers over traditional scuba gear!


Why the Avelo System Improves Your SAC

stable neutral buoyancy improves your SAC

The Avelo Dive System enhances a scuba diver's air consumption performance (SAC rate) by offering several advantages, including:

  1. Stable Neutral Buoyancy: The Avelo system maintains a constant neutral buoyancy, eliminating the need for continuous depth adjustments. This reduces the energy expended by the diaphragm on buoyancy control, resulting in decreased air consumption.
  2. Reduced Drag: Designed to be streamlined and lightweight, the Avelo system minimizes drag and facilitates easier movement through the water. This reduces exertion for the diver, further decreasing air consumption.
  3. Improved Breathing Technique: The Avelo system's design encourages a relaxed and efficient breathing pattern, contributing to reduced air consumption. The Avelo Mode on some dive computers can help the diver take this to the next level. Through the use of the Avelo Mode, a diver can learn what actions will achieve their personal optimum sac rate.
  4. Reduced Mental Strain: The user-friendly nature and stable buoyancy of the Avelo system help alleviate mental strain, leading to more efficient breathing and improved air consumption.

Collectively, these factors significantly enhance a diver's SAC rate. Studies have demonstrated that divers using the Avelo system can save up to 30% on air consumption compared to traditional scuba gear. This means that divers can enjoy more underwater time without concerns of running out of air.

Benefits for Novices and Advanced Divers Alike

Whether you're a newbie still finding your fins or a seasoned diver with a thirst for exploration, the Avelo Dive System is a true game-changer. This revolutionary system is designed to enhance every aspect of your diving experience.

For beginners, the Avelo Dive System provides a smoother and more controlled breathing experience, instilling confidence as you navigate the underwater world. With its advanced technology and ergonomic design, it ensures ease of use and comfort, allowing you to focus on honing your skills and discovering the wonders beneath the surface.

But it doesn't stop there. The Avelo Dive System opens up a whole new realm of possibilities for advanced divers. Its innovative features enable you to explore deeper depths and prolong your underwater adventures. Unleash your curiosity and delve into the mysteries that lie beneath, as the Avelo Dive System supports your desire for exhilarating challenges and unforgettable encounters.

Whether you're just starting your diving journey or seeking to redefine your limits, the Avelo Dive System is your ultimate companion. Dive in and experience the extraordinary.



Reducing the air consumption rate is of utmost importance for all scuba divers. The Surface Air Consumption rate, or SAC rate, indicates the air a diver uses per minute at the surface. Various factors such as physical fitness, drag, breathing techniques, and mental attitude all influence SAC rates. With the revolutionary Avelo Dive System, divers can achieve an impressive reduction of up to 30% in their SAC rate. By optimizing air consumption, Avelo empowers divers to explore the underwater world for extended periods, enhancing their diving experience and enabling them to delve deeper into the mysteries beneath the surface. Embark on the future of diving with Avelo and unlock a whole new level of underwater exploration.

Minimize your SAC with the Avelo Dive System

Frequently Asked Questions 

What is a SAC rate?

SAC, which stands for Surface Air Consumption, refers to the amount of air a scuba diver breathes in one minute while on the surface. This measurement is typically expressed in cubic feet per minute (cfm) or liters per minute (lpm). A diver's SAC rate can vary depending on factors such as their fitness level, breathing technique, and the type of diving they engage in. For experienced scuba divers, a typical SAC rate falls between 0.5 and 1.0 cfm. Understanding and monitoring one's SAC rate is crucial for safe and efficient diving.

How does a scuba diver determine his SAC rate?

To determine the Surface Air Consumption (SAC) rate, a scuba diver records the starting and ending air pressure in their tank (in psi or bar) before and after the dive. They also note the total bottom time (in minutes) and average depth, which is then converted to ambient pressure in atmospheres absolute (ATA). The SAC rate is calculated by subtracting the ending tank pressure from the starting pressure to find the total air used, dividing by the dive time to get the air used per minute, and then dividing by the ATA to adjust for depth. This reflects the amount of air the diver would use per minute at surface pressure.


Is the Avelo Dive System suitable for beginners?

Absolutely! The Avelo Dive System is designed to benefit both novice and advanced divers. For beginners, it offers smoother, more controlled breathing, helping you gain confidence underwater. For advanced divers, it allows them to explore deeper depths and stay underwater longer. To use the Avelo Dive System, all divers must first undertake an Avelo Speciality Diver Course (RAD)

Can the Avelo Dive System replace my traditional scuba gear?

Yes, the Avelo Dive System can replace certain parts of your traditional scuba gear. It simplifies your gear setup by eliminating the need for a separate buoyancy compensator. However, you'll still need your regulator, dive computer, mask, fins, and other essential scuba diving equipment.

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