RMV vs. SAC: What’s the Difference?

Few topics generate more confusion among divers and instructors than Respiratory Minute Volume (RMV) and Surface Air Consumption (SAC). This video tells you what you need to know in simple, easy-to-understand language.

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Gas matching in action

There are many ways to deal with dissimilar cylinder volumes. There is one method, however, which even if you don’t use it, you should at least understand.

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Turrets: Not Just for Tanks

When selecting regulators for cave diving, there are many important features to consider. There is one feature, however, which can prove critical in a gas-sharing situation. It’s vital you understand what this feature is and why it’s important.

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Mircro hauler

The Micro Gear Hauler Project

Conventional wisdom is that, to be a cave diver, you must have a full-size truck, van or SUV. That’s not necessarily true. In many instances, you can get your gear to and from the water quite economically.

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A GoPro in your pocket?

A “GoPro in your pocket” is rapidly becoming standard operating procedure for many cave divers. If you are thinking about adding the new GoPro Hero 8 to your inventory, there is something you should know first.

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Solo Diving Survey Results

Solo Diving Survey Results

Among the most surprising results of our July survey on cave diver behavior was the fact more than half of respondents say they solo dive in caves, at least on occasion. We decided to take a closer look.

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Backmount: Not Dead Yet

According to our recent survey, there may be more sidemounters than backmounters in caves. But if you backmount, don’t worry. The days of backmount are far from over.

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The timely demise of the “Snap-n-Gap”

According to our recent survey, 90 percent of our readers have only been cave diving since the turn of the century. Most started cave diving in just the past ten years. This means most have no idea what cave diving was like a quarter century ago. Things were very different

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the 300

Are you among the 300?

If you are among the 300 people who responded to our recent survey, you just made a valuable contribution to cave diving. And you didn’t have to die in a hail of arrows to do it.

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