Re: [PSUBS-MAILIST] PSUB Fatalities...

[MerlinSub@t-online.de (Carsten Standfuß)]

The look with divers for the sunken german two-man-submarine. Also with
a sistership. Unfourtunatley the sunken submarine was out of the area
which was accord before diving. So they have looked in the wrong area. 
They found it after months. Two sportdivers did the claim. 

Freeescape: 
And for deeper free escapes maybe a airbag with a rope on your 
hands together with a small spareair or small scuba gear (heliox ot
trimix)
will do the job. You can relase the airbag if you near the 70 feet deep
range 
to stop your highspeed surfacing. Seems simple. 

But I think it is a good and nessesary idear to make a quick calculation 
which size (diameter) the flooding vale in our PSUBS should have. 
I think the boat must be filled to outside pressure 
in about 1-3 minutes. Anybody knowes how to calculate this ? 

The bottom time for free escape without stopping is about 1 minute in
90m deep...
Its   2 minutes in 80 m deep, 
Its   2 minutes in 70 m deep,
Its   3 minutes in 60 m deep,
Its   4 minutes in 50 m deep,
Its   7 minutes in 40 m deep,
Its  17 minutes in 30 m deep,
Its  45 minutes in 20 m deep,
Its 653 minutes in 9 m deep, 

Carsten

Captain Nemo schrieb:

> I think there's been a lot of good safety considerations made in this
> thread.  Another one I'd like to suggest is the addition of an EXTERNAL
> FLOOD VALVE your rescuers can get to, that will enable them to equalize
> pressure inside the boat and get to you in the event you're stuck on the
> bottom, incapacitated,  and trapped inside.  I don't have one of these on my
> boat yet, but after reading about the German accident, I'm going to install
> one.  (That guy was only in about 100 feet of water; I'm wondering why
> divers couldn't get him out, and I'm guessing maybe they didn't have a way
> to equalize the pressure on the hatch?  Carsten / Anybody know about this
> part of the accident?)
> 
> Pat