[PSUBS-MAILIST] emergency lift bags

Thu Aug 14 17:19:31 EDT 2014

Just wanted to put in a plug for situational awareness, as many entanglement scenarios can be reversed if you are aware of how you became entangled in the first place. A camera covering your skids or other likely appendages could easily pay for itself in that event.

Sean

On August 14, 2014 1:42:04 PM PDT, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>Hank, trouble is if you are at max depth the air won't go as far. 
>DW2000
>would be lucky to have 100 lbs of buoyancy (figuratively speaking).
>They
>work on plan B.
>Another side of the problem is that if you are caught by the tail and
>you
>blow tanks then you have to see that the tanks will work at a
>reasonably
>steep angle.
>I am planning on putting in a couple of emergency bags but I think we
>are
>overdoing that side.  As they say "Plan the dive and Dive the plan"
>should
>keep you out of most trouble with the emphasis on what if S--- happens.
>With the advent of Kevlar fishing gear and ropes the danger is
>increasing.
>I plan on keeping in touch with the tech divers who have the ability to
>rescue me at depth.  They can do 400 ft but would have to be brave to
>do 600
>ft.  However if you need extra ballast then you can do worse than
>adding Air
>cylinders.  Chs Hugh
>
>
>
>
>-----Original Message-----
>From: Personal_Submersibles
>[mailto:personal_submersibles-bounces at psubs.org]
>On Behalf Of hank pronk via Personal_Submersibles
>Sent: Friday, 15 August 2014 12:49 a.m.
>To: Personal Submersibles General Discussion
>Subject: Re: [PSUBS-MAILIST] emergency lift bags
>
>
>--------------------------------------------
>Hugh,
>If I was entangled in a net or line  that was attached to the bottom, I
>think I would be happy to have an extra 5,000 lbs of lifting force.  I
>would
>prefer to have 5,800 lbs force trying to break free than 800lbs force. 
>In
>my line of work, when I can't lift it, pull it or push it, I add more
>power!
>It might be futile with an extra 5,000lbs but I would sure like to
>opportunity to try.
>Hank
>
> Subject: Re: [PSUBS-MAILIST] emergency lift bags
> To: "'Personal Submersibles General Discussion'"
><personal_submersibles at psubs.org>
> Received: Wednesday, August 13, 2014, 5:49 PM
> 
> Ask him what to do when
> entangled with a net or line attached to the bottom!
> 
> 
> -----Original
> Message-----
> From: Personal_Submersibles
> [mailto:personal_submersibles-bounces at psubs.org]
> On Behalf Of hank pronk via
> Personal_Submersibles
> Sent: Thursday, 14
> August 2014 9:31 a.m.
> To: personal_submersibles at psubs.org
> Subject: [PSUBS-MAILIST] emergency lift bags
> 
> When talking with a friend
>about escaping from a submarine, he asked why  can't your sub have a
>lift
>bag capable of  raising the sub even when full of  water.  I  could not
>give
>a good reason why not.  A large volume of  air would  be needed of
>coarse. 
>Some fast  math on a napkin revealed that 6 80cuft  scuba tanks could
>raise
>Gamma from 600 feet.  Two 240cu ft tanks strapped to  the bottom of  a
>sub
>and two lift bags, one at each end  could do it.  Why  bail out why not
>just
>raise the whole  thing unless your tangled and stuck of  coarse.
> Just a thought
> Hank
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-- 
Sent from Kaiten Mail. Please excuse my brevity.
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