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Archive for the ‘Uncategorized’



Land, Lakes Linked Underground by Sinkholes

April 03, 2010 By: Duane Johnson Category: Uncategorized

I wanted to post this article I found. It is pretty interesting. I’ve never heard of sink holes in the bottom of the Great Lakes, but apparently they exists. Here is a quick snippet of the article. The link to the full article is below.

Robert Ballard, discoverer of the sunken Titanic, and a team of researchers set out in 2001 to map shipwrecks offshore of Michigan in Lake Huron’s Thunder Bay National Marine Sanctuary. A geologist by training, Ballard took notice when imagery from the team’s side-scan sonar revealed dozens of large depressions in the lakebed.

Upon further inspection, the depressions proved to be sinkholes. Researchers were surprised to find some of them teeming with brilliant purple bacteria and other peculiar, seemingly primitive organisms (see March Bay View Compass). Similar life forms previously had been found only in extreme places like the deep sea and Antarctica.

Full Article:
Land, Lakes Linked Underground by Sinkholes

Dive Safe,
Duane
Precision Diving

Why You Should Avoid Discounted Classes

March 14, 2010 By: Duane Johnson Category: Training, Uncategorized

Many Cheap Things Can't Be Good

I should start off with an apology. This will be more of a rant than anything too useful. But since no one else is paying my web hosting fees, I’m free to do what I want on my blog. I was talking with a prospective student this week about a couple courses he was interested in taking. Specifically, my buoyancy and wreck diver courses. Just like many people before him, the first question was “Why are your prices so much higher than everyone else?” He seemed intent on trying to nickel and dime me on my course pricing. I stood my ground. (more…)

Precision Diving Sponsorship Experiment

March 04, 2010 By: Duane Johnson Category: Uncategorized

I’ve been looking for new ways to grow the readership of this blog. So I’ve decided to have a contest. Rather than make people pay for sponsorship, I’d like to do something that will get people more engaged in being a sponsor, without having to pay for it right away.

I’m going to open up a few spots for anyone who would like to have a sponsorship on this blog in order to promote your own blog/web site, dive store, dive charter, or diving business. The benefit, get some free traffic to your business. (more…)

2010 Diving Goals

February 24, 2010 By: Duane Johnson Category: Uncategorized

Duane Johnson - Tech Instructor

Duane Johnson - Tech Instructor

Every year I sit down and look at the previous year’s diving. Based on that analysis, I try to set some diving goals for the new year. At the beginning of last year, I wanted to have longer bottom times. I was able to average 50 minutes for recreational dives. I was able to push a few technical dives to 25 and 30 minutes of bottom times. After looking at my personal diving over the past couple years, I’d like to take another class. (more…)

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