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For the first, when you begin your dive with a full tank (or tanks), you will have the extra weight of the gas. So you will be heavier and sink without problem.

For the second, if you breathe out (in the situation you describe) and start sinking, you will begin to loose buoyancy as you sink because the increased water pressure will compress your suit and any remaining air in your BCD/wing. So once you are a few metres down you can breathe in but still not immediately float back up.

You can of course turn upside down and swim down, but if you need to do that with a full tank you are risking being underweight when your tank is nearly empty and you may have difficulty in controlling your ascent in the last few metres or holding position for a safety stop.

Mark




Mark Dougherty
Mark Dougherty 2009-08-19 11:58:26
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Huvudinlägg Avvägning Lars Olsson 2009-08-19 11:34
svara Sv: AvvägningMicael Blume2009-08-19 11:57
svara Sv: AvvägningMark Dougherty2009-08-19 11:58
svara Sv: AvvägningLars Olsson2009-08-19 12:18
svara Sv: Sv: AvvägningPeter Segerdahl2009-08-19 13:45
svara Sv: AvvägningMikael Wedham2009-08-19 12:29
svara Sv: Sv: AvvägningLars Olsson2009-08-19 13:10
svara Sv: AvvägningKatja Ritter2009-08-19 12:34
svara Sv: AvvägningMarkus Gustafsson2009-08-19 12:52
svara Sv: Sv: AvvägningLars Olsson2009-08-19 13:14
svara Sv: Sv: Sv: AvvägningLars-Göran Persson2009-08-19 20:37
svara Sv: Sv: Sv: Sv: AvvägningLars Olsson2009-08-19 22:09
svara vadå tillstånd?Anders Oskarson2009-08-20 10:37
svara Sv: AvvägningMichael Olin2009-08-19 13:08
svara Avvägning lite mer exaktPeter Steinhoff2009-08-19 16:15
svara Sv: Avvägning lite mer exaktLars Olsson2009-08-19 22:08
svara Med ett enda ord...Karsten Ovesen2009-08-19 22:44
svara Sv: Med ett enda ord...Lars Olsson2009-08-20 10:02

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