Could anyone give me general information?

[RastaShark]

Hi! I know this question has probably been asked a lot or there's a lot of information out it on the interwebs. I'm a regular recreational diver, only have my rescue diver certification and I'm looking more and more to explore and experience the other types of diving beyond recreational limits. I just wanted to get a run down or basic information on how decompression diving works, how do you plan them, what gases do you use, when do you use them, for example if you did a dive to 50 meters or 60 meters beyond recreational limits what would you do etc. I'm very curious and would like to know more. I plan to do my Dive Master course and then possibly switch to an agency like GUE or TDI to explore the technical side of diving. I just wanna know what the run down is or the basics.

 

[northernone]

Without typing an instruction manual I recommend availing yourself of the hundreds of explanations already online to answer a general question.

It's also covered in training.

Here's a few links:

NWGratefulDiver.com

Choosing Decompression Gases for a Dive | SDI | TDI | ERDI

Happy diving and feel free to ask any specific questions are you progress in your learning..


All the best,
Cameron

 

[tbone1004]

I would skip out on Dive Master as imho it won't actually teach you anything useful unless you want to work as a dive master and go straight into GUE fundamentals.

For Deco, read the following. There really isn't a better way to explain it on here without getting very long winded and technical.
Deco for Divers by Mark Powell

Long story short
You plan them the same way you plan any other dive.
Choose equipment appropriate for the diving conditions
Plan your depth limits
Plan your time limits *this can either be based on how long you can stay down on the tanks that you are going to carry, or if you are on a "mission" determining how much gas you are going to need to meet the dive time required
Gasses are chosen based on the same limits that you choose for recreational diving. You have a depth, you have a PO2 limit that you choose, and you set your fO2 to some appropriate amount. For deep dives, you then have to set your PN2 to a limit that you choose and the balance is helium. Alternatives are to use "standardized gasses" which is what most cave divers end up using and those are based on the WKPP/GUE gas standards.
Plan your decompression-this is based off of consulting a dive planner either in table or software form and is based on which algorithm you choose, how you modify that algorithm for conservatism, etc etc, and then choose your appropriate decompression gas/gasses

 

[RastaShark]

Thank you guys for the replies! I'll be sure to check out the links and books.

 

[Diver0001]

Hi! I know this question has probably been asked a lot or there's a lot of information out it on the interwebs. I'm a regular recreational diver, only have my rescue diver certification and I'm looking more and more to explore and experience the other types of diving beyond recreational limits. I just wanted to get a run down or basic information on how decompression diving works, how do you plan them, what gases do you use, when do you use them, for example if you did a dive to 50 meters or 60 meters beyond recreational limits what would you do etc. I'm very curious and would like to know more. I plan to do my Dive Master course and then possibly switch to an agency like GUE or TDI to explore the technical side of diving. I just wanna know what the run down is or the basics.

Are you looking to DO those types of dives or are you just looking for the information?

Someone above recommended Mark Powell's book. I would second that recommendation. It's an excellent book that's exceedingly well written. Even experienced divers will have "ah ha" moments as he explains things in terms that make the concepts crystal clear.

Personally, I think his book should be required reading for anyone doing a DM course or any kind of technical specialty.

R..

 

[RastaShark]

Just looking for information for now, I want to read up on it and learn a little bit before taking courses with GUE or TDI. I live near a tourist type city, so the only diving around me is recreational (Max 30m) so there really isn't many divers around me who have technical experience so I couldn't ask them so decided to come here. Thanks for your reply!

 

[Doby45]

What is your current highest certification level? If you are NOT advanced, I would do that before even thinking about deco.

 

[RastaShark]

What is your current highest certification level? If you are NOT advanced, I would do that before even thinking about deco.

I'm a Rescue Diver about to enter DM course. After I complete DM I plan on enrolling into GUE or TDI.

 

[Doby45]

So you have done advanced? You know depending on the instructor you can do rescue prior to advanced. You know rescue does not give you any additional depth. I would do some depth training prior to deco.

 

[KevinNM]

I found that the PADI deep course was interesting and useful. I remember being at 130 or so and doing the tasks I was asked to do, but I was so task loaded just following a compass out and back that I had no idea about my NDL or gas, even though they were right on my wrist. I was within a second or so with the mechanical "disassemble and reassemble this" task, but the other more cerebral one was just crazy hard at depth. So the whole GUE 'helium below 100 feet' thing doesn't seem that unreasonable to me these days.