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Re: >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 have yet to do any technical diving/decompression diving per se, but I have the Mixed Gas Diving book and have played with a lift bag on simulated deco stops. I am waiting until I have a few more dives on the logbook until I head to Ocean Tech and take some TDI courses. I am scheduled as a subject in a hyperbaric study at Duke on O2 surface intervals. Anyway... As a planned decompression dive, you should probably plan for the eventuality that you may not be able to find/get to the anchor line before beginning your ascent. This may mean bringing your own supply of deco gas (if other than air) with you. It should mean that you have a reel and lift bag. I was shown this technique by Joe Mierwa after he attended a deep air course with TDI. You fill the liftbag after hooking it on to the end of the reel and let it shoot to the surface. This is not easy to do without changing your depth so *PRACTICE*. Once the bag gets to the surface, you make yourself negative and float in the current suspended from the lift bag. The bag should be visable at the surface and the boat can come get you. I'lllet you know any other techniques after I come back from Fl ! Mark -- Mark Lefevre 919-479-3510 MCU Design Engineer PADI AOW Mitsubishi Semiconductor "One of these days I'm going to Three Diamond Lane; Durham, NC 27705 to dabble into EVIL"
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