Precision Diving

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Archive for July, 2009



How to Calculate Partial Pressure of Oxygen

July 31, 2009 By: Duane Johnson Category: Knowledge Base, Training

When divers go through Nitrox classes, one of the things they should learn is that the human body doesn’t respond to the percentage of oxygen in the gas mixture, but rather our bodies are affected by the pressure of oxygen. For example, if we travel from sea level to an elevation of 14,000 feet, we will start to breath harder and feel like we aren’t getting enough air. The percentage of oxygen at sea level is 21% and the percentage of oxygen at 14,000 feet is also 21%. So the difference is that there is less pressure at a higher elevation. This is what our bodies are responding to. Our bodies have evolved to breath oxygen at sea level. (more…)

How to Become a Better Scuba Diver [VIDEO]

July 21, 2009 By: Duane Johnson Category: Knowledge Base

There have been numerous discussions on how people can become better scuba divers. From taking more diving classes to simply going diving more. This video blog post will discuss how divers really need to modify their behavior, attitude and thought process in order to become better divers. Also discussed with be changing habits, both good and bad, to enhance the diving experience. Most continuing education classes are designed to teach new diving skills to enhance one’s diving. They are not designed to make better divers or change a diver’s behavior. (more…)

Public Apology to Thailand Tech Diving and Aquanauts Dive Centre

July 07, 2009 By: Duane Johnson Category: Uncategorized

Yesterday, I posted an article on PADI/DSAT’s purposed changes to their technical diving courses. I received the content of my post in an email from a reader. This email did not provide a link. As it turned out, Bob James of the Aquanauts Dive Center located in Pattaya, Thailand is the original author of the content. I should have done a little bit of research prior to publishing the post. I have since updated the post to provide a link to Bob’s article. For my mistake, I sincerely apologize to Bob James and all of his staff at Thailand Tech Diving and the Aquanauts Dive Centre.

Going forward, I still encourage my readers to send me ideas for blog posts. But please make sure you are the original author or provide a link to the original work so I can give proper credit to the original author.

Again, I sincerely apologize to Bob James and his staff for my oversight.

Dive Safe,
Duane Johnson
Precision Diving

PADI/DSAT Outlines Coming Changes to TecRec Courses

July 07, 2009 By: Duane Johnson Category: Uncategorized

This information came from a PADI meeting in Pattaya, Thailand in which the PADI representatives discussed changes to their technical diving classes. At the time of this article, I do not know if these changes will be PADI worldwide or they are only PADI Asia. These are purposed changes and not currently the standard. The interesting thing I took away from this is that PADI, once again, is making it easier for people to enter their technical diving program. Instead of focusing on firming up their education, they listen to the marketing team. (more…)

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