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Does anyone know the o-ring size for a standard cylinder? Ok, I'm editing this post because I found what I needed. The o-ring size I was looking for is a 014

I am a DMC in Denver looking for advice on mapping the Blue Hole in New Mexico, any suggestions?

This sounds like fraud to me. If there was an incident that was investigated and they start punching numbers in the system and find she was really a pro diver she could sink herself, although I could be totaly off base.

Ok, but then can I make the DM active again later down the road?

I think I need to put some thought into DM because once you pass through the Master Scuba Diver cert into the DM, it now lables you as a professional and you better be insured or quit diving. This would not be good because you cannot go back to master Scuba Diver.

I'm planning on going on to teach scuba as a pastime after retirement (in 5 years). I am 50 now and going for "Rescue" this year. The DM insurance is getting confusing. I was told today by a dive shop owner that once a DM you are liable no matter what. If you are on a boat with two groups and a...

El Orans, Thanks, how do I close the thread?

Rob is a commercial saturation diver for Global Divers in Louisiana. > He performs underwater repairs on offshore drilling rigs. Below is an > E-mail >he > sent to his sister. She then sent it to radio station 103.2 on the FM >dial in > Ft. Wayne, Indiana, who was sponsoring a...

I was waiting for you to catch that. Thanks for the use of it. I'll find another soon.

Most diving headaches are caused by either carbon dioxide retention or sinus barotrauma. Here are the most common headaches resulting from diving and what you can do to prevent them. Carbon Dioxide Headaches Symptoms: Post-dive localized throbbing pain The carbon dioxide headache, one of...

Headaches and Scuba Diving From Melissa Rodriguez, Your Guide to Scuba Diving. FREE Newsletter. Sign Up Now! Causes, Preventions and Treatments for Dive Headaches Diving headaches have spoiled many a scuba diver’s vacation or dive trip. There are several different causes associated...

DAN gets many inquiries regarding headaches and diving. Probably very few divers who dive regularly have not left the water at least once with some cranial discomfort. This piece reviews the common causes of headaches in diving and offers some simple advice that should solve the problem in most...

Call thier 800 number and ask anyway. Don't mess around.

If you are a member of DAN I would call. Diversalertnetwork.com

3mm for me in that temp range is plenty. I think a 5mm would be too much

http://www.sanddollarsports.net/ Find out if these guys are the dive operators, then try to use this link to contact them

What is involved in keeping your DM Cert current?

Nice Pic

Not including being on the surface or having a cut or carrying food or chum, how likely are you to be messed with by a shark at depth? This is also assuming you keep your hands to yourself.