hantzu701
Contributor
This sounds like a very expensive dive. Surface support. Chase boats. Rotating teams of divers. Staging areas to penetrate and exit the wreck. Have u had a chance to talk to AG?
Preperation for a deep dive...
- Thread starter Seabear70
- Start date
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Basically, I am so early into the planning stages of this I realy have not talked to anyone about actually doing the dive. I know quite a few people that would be interested in doing this, between the various people I would contact we would have the nessecary gear and personel to make it happen.
Their are two problems with contacting these people...
1. They'e even crazier than I am.
2. Because of #1, they'd want to go long before I was ready, and so I would find myself either brushed asside, or more likely railroaded into making the dive sooner than I was ready for it.
So, until I work out all of the details, I will not be talking about it with many people.
Their are two problems with contacting these people...
1. They'e even crazier than I am.
2. Because of #1, they'd want to go long before I was ready, and so I would find myself either brushed asside, or more likely railroaded into making the dive sooner than I was ready for it.
So, until I work out all of the details, I will not be talking about it with many people.
Seabear70:
Nothing wrong with throwing it out there for discussion. People are diving 200 ft wrecks every day of the week and it's no biggie...when you're ready.
An hour of bottom time adds to the difficulty and logistics and planning a traverse adds to the complexity.
Seabear70:
Other than the thousands who happen to frequent this bulletin board, huh?
theskull
DennisS
Contributor
There's still time to do a penetration/survey on air. I think there's a hold because of some EPA permit.Seabear70:
Barracuda2
Contributor
60 min. @ 210 ft. on air?? Doesn't narcosis enter into this picture at some point? I experienced narcosis on a 30 min. 130 ft. deco dive in lake Huron. I can't imagine what I would be like at 210 ft. for 60 min. or did I miss something?
Barracuda2
Barracuda2
As pointed out, it would be better to do this on Mixed gas, and avoid the dangers of both nitrogen narcossis and O2 toxcicity. However, yes, it is possible to dive at those depths on Air. I do not recommend it, however, My experiences at those depths on air have not been so bad. I have been told, and through personal experience, I believe that Narcosis affects different people differently, and may even affect the same person differently at different times.Barracuda2:
Once again, I do not recommend you try this. My first time to these depths on air was in a dry chamber run, and that is about as controlled as you can get.
junior diver
Guest
OK. I've been doing some research using the Navy tables and this is what it recommends. You plan the dive 10 feet or 20 feet deeper then you are going. So you dive to 220fsw on 17% as that is the most O2 you can have at that depth. You then ascend at a speed of 30 feet per minute to 100fsw which it recommends you do on bottom mix for a 7minute stop but I think that you could do this on a higher O2 than 17% to reduce the chance of narcosis. A 4 minute stop at 90fsw on 50%. A 9minute stop at 80fsw on 50%. A 12minute stop at 70fsw and a 18 minute stop at 60, 50 and 40fsw all on 50%. Then at 30fsw its 36minutes on 100% and a 20fsw 66 minutes on 100% again. But this is what it says on the tables and its just occoured to me that 30fsw is too deep to use 100% isn't it?
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