Talk:Decompression stop

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nice article


........

[edit] Things to do

  • describe the mechanisms involved in decompression stops:
    • offgassing
    • bubble reduction
  • types of deep stops:
    • Pyle
    • reducing gradients
    • WKPP deep stops

[edit] 2000 foot dive

Dear Mark,

Thank's for all the info. I'm not a diver but I'm trying to learn about diving, decompression, etc. In the movie The Abyss, the divers work safely at 2000 feet and I have some questions:

1. In this hypothetical 2000 feet dive, using scuba, how much time would be necessary to descent?

2. How much time would be necessary to decompress?

3. Is it possible to design a decompression table for this situaton?

Thank's

Alvaro Augusto http://alvaug.multiply.com

Although the question was not directed at me, I will take liberty of replying.
1. The rate of descent in SCUBA diving is usually only limited by diver's ability to equalize his sinuses. There are some opinions that too rapid descent increases affects of Nitrogen narcosis, but it is not confirmed.
2. SCUBA dive to 2000 meters was not attempted yet. The record for deepest SCUBA dive is about 330 meters (990 feet). The wet decompression (actual acsent in the water) was 26 hours, and after that dry decompression was performed (in a decompression chamber).
3. Dives below 100 meters (300 feet) require using different gases on different stages of the dive, such as trimix and nitrox. It would be impractical to design decompression table for each dive profile. Therefore special decompression software (such as V-Planner and GAP Software) is used to calculate decompression stops.
I hope this was helpful. You are welcome to ask me further questions. Michagal 08:19, 13 August 2006 (UTC)

I don't know the answers to your questions - a 2000 ft dive is way out of my depth. Here's a link to some links to deco software, http://www.deepdiving.net/tools/deco.html. I've used ZPlan, DDPlan and MV-Plan. I think you'll find none will plan a dive as deep as you want. Mark.murphy 20:56, 13 August 2006 (UTC)

[edit] Dive profile

The dive profile are usualy drawn with Y-axis (depth) pointing down. I would suggest replacing the image. Michagal 10:17, 13 August 2006 (UTC)

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