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To: Tracey
To: Baker <tab@pa*.co*>
Subject: Re: Here's a real one to think about
From: Richard Pyle <deepreef@bi*.bi*.ha*.or*>
Cc: techdiver@opal.com
Date: Tue, 21 Jun 1994 10:11:46 +22305714 (HST)
I'll give this one a stab....

On Tue, 21 Jun 1994, Tracey Baker wrote:

> You're diving on an ocean wreck, depth about 130', with fairly good
> visibility and a slight current.  After racking up a moderate amount of
> decompression, you begin your ascent.  As you ascend, you notice the
> current becoming a bit stronger; when you finally get to your first
> stop, at 30', you are holding on to the ascent line with both hands
> so you won't get swept away -- the current has really picked up since
> you started your dive.  You can't even let go with one hand long enough
> to get your jon line out, and about halfway through your 40 minute hang,
> your arms _hurt_ and you feel that you just can't hold on any longer.
> 

I've made many long decompressions (including a few 120-minute hangs after
trimix dives) in such currents, so I'd like to comment.  However, before I
say what I would do in this circumstance, I need to know the following:

1. Is the ascent line the anchor line to the boat?
2. If not, where is the boat, and is it anchored?
3. Are there any people in the boat, and do they know how to drive it?
4. Are there any/how many people in the water (i.e., buddies) with me with
	similar decompression obligations?
5. Do I have a "jon-line" or penetration line reel, or any other line with me?
6. What kind of backpack/B.C am I wearing?
7. Do I have any other independant cylinders, and if so, what gas is in them?
8. Do I have anything which might serve as an inflatable buoy (lift bag?
	non-mesh goodie bag? plastic bag?)
9. What depth am I at half-way through this 40-minute decompression? (if
the first stop is at 30', I suspect that at 20min I'm at or near my 10' stop)
10. Do I have a knife?


I'll probably need to know more, but this would be a good start.

Aloha,

Rich

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