Re: [PSUBS-MAILIST] safety issues

[Robert Ossian <rob_neptune@yahoo.com>]

Not really..  I live in Austin, Texas and the primary
dive location I'll be using my sub in will be Lake
Travis, wich is really just a huge segment of the
Coloradao River with tons of submerged oddities in it.

I checked the nautical charts for the Lake (river)
between myself and about 100 miles in any direction
and foudn the max depth was about 200 feet (give or
take a few feet based on surface levels).  So, if all
goes to hell on me and:
1. My inherent positive bouyancy fails, and
2. My VBT fails, and
3. Both of my emergency inflation systems fail, and
4. My emergency ballast drop fails, and 
5. My secondary equipment drop system fails
6. I can use either the primary or secondary hatches
and use the emergency BC and Catalina 13 SCUBA tank to
surface and swim my butt to shore.

The natural boundary of approx 200 feet keeps me from
"accidentally" dropping too far, and designing the sub
for an an unreachable (at least for my geographic
location) depth gives me an excellent safety boost.

Hope this clears it up for ya a little,
Rob

--- Paul Kreemer <paulkreemer@gmail.com> wrote:

> That seems like a short amount of time!  Isn't it
> common to just not operate
> in water depths greater than your crush depth?  Or
> even your max operating
> depth?
> 
> Paul
> 
> On 1/5/06, Ian Roxborough <irox@ix.netcom.com>
> wrote:
> >
> > On Thu, 5 Jan 2006 09:41:08 -0800 (PST)
> > Robert Ossian <rob_neptune@yahoo.com> wrote:
> >
> >
> > One way of looking at the the margin is "how long
> do you have
> > to solve you problem before you hit crush depth". 
> With 150feet
> > safety margin, if you are sinking at 1 foot per
> second, the time
> > from max opteration depth to crush depth is 2.5
> minutes.  If
> > you are decending at 2 feet per second, your time
> is 1.25 minutes.
> >
> > Ian.
> >
> >
> >
> 


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