"Hey guys, we got three spaces left on a charter for the Radford on June 4th out of Indian River, DE. We are planning on double dipping the site. This charter is open to anyone certified at the Tech 1 level or equivalent. The weather is looking great…"
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Jonathan Edwardsen
- Male
- Arlington, VA
- United States
- UTD Community Blog Posts (1)
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- Classes and Events
- Groups (2)
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Latest Activity
"Hey Adam,
I know Bonnichsen needs a teammate for June 3 so I would check with him. He might finish his Essentials of Tech that day..."
"I have been using the method shown in the pictures for about a month and have had great success with it. The D-rings are open and easily accessible. I am happy we switched over to the method when we re-rigged my unit back in February."
UTD Z-Side-Mount Diving
A group dedicated to divers who are interested in learning about, discussing and highlighting Z-Side_mount Diving and the Z-System.
"Hey guys & gals,
Submerged is hosting a guest speaker, Dave Howe, of IMH. He is giving a lecture on the wrecks of the Chesapeake Bay on March 18th at 1pm. Dave is going to discuss on going research that IMH is conducting in the bay and…"
Ice men
"and the rest of that post....
A common failure cold water divers experience is either a first or second stage freeze up. A less common but still experienced is a valve freeze or “stuck open” failure. All of these pose a huge risk…"
Ice men
"As a qualified and experienced ice diver and ice diving instructor, I have seen and used many different configurations while under the ice. We all know that single tank ice diving without a redundant gas system is crazy and puts the team at risk.…"
UTD Mid-Atlantic Chapter
An open group for anyone interested in training and diving in the Mid-Atlantic region or on any of our group sponsored trips. This group is associated with Submerged, Inc. as the teaching facility. See the calendar for pool sessions and training dive opportunities, and monthly local dive events.See More
"AG,
So here is a little cold water/weather update on the solar heater for our diving in the Northeast. The weekend started off with 4 inches of snow and about an inch of ice. Needless to say we had a few people unable to make it to the dive…"
Profile Information
- What are your levels of training?
- Instructor, Trimix Diver, Overhead Diver
- Favorite Dive Sites (water, not internet)
- Northeast/Mid-Atlantic diving (and other local stuff), Mexico caves, etc...
- Your personal website:
- http://www.submergedonline.com
- If you are an Active Status UTD Instructor, what classes do you teach?
- UTD Recreational, Technical, & Trimix courses
- Do you agree to read and follow the UTD Community Code of Conduct when you join this site? Important note: When you join our site, you are automatically subscribed to our newsletter. However, you can easily unsubscribe from our list when you receive your first issue.
- Yes
Jonathan Edwardsen's Blog
Solar Heating Unit Review
Posted on December 20, 2011 at 6:08am 2 Comments 4 Likes
This past weekend Tanya and I were teaching an Essentials of Tech class and trying out the Solar Heating Unit. On Saturday, we conducted two dives that lasted about an hour and a half or so each in 35F/2C to 46F/8C water. The air temperature was around 32F/0C. I had on the equivalent weight of a 400g polartec undergarment and was using air for dry suit inflation. On both dives I ran the heater the entire dive on “low” (11.4v/10ah LiPo battery). Why run the heater the entire dive? Well, I am…
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Classes and Events
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Essentials of Recreational Side Mount
May 31, 2012 at 8pm to June 3, 2012 at 8pm – Montréal - Quebec
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Essentials of technical Sidemount
July 6, 2012 at 3pm to July 8, 2012 at 6pm – Skanderborg, Denmark
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