The best way that I’ve found to
avoid having to escape from a sub is to follow the “ADP” rule
(Always Dive Positive). My sub was originally set up to sink to the bottom (slightly
negative) and put around in the silt. At some point I decided to add a single vertical
thruster (with variable speed) like a few other subs had. What a difference! It
is so much more enjoyable to dive positive and power the sub down. Hover at any
depth by turning a dial. Now I can fly over the bottom without kicking up a
bunch of silt. But best of all, if you cut power the sub slowly comes back to
the surface. It makes for much more enjoyable diving- especially when the
bottom is deeper than you want to be! I can highly recommend adding a vertical thruster
to any kind a sub you happen to own.
As far as submarine rescue goes, the JSL’s
have a neat system. They send up a buoy on a small line and the surface support
vessel sends down a heavier line (that follows the small line back down) with a
grappling hook that grabs the sub.
But even if you don’t have a support
vessel, it’s a great idea to have a releasable buoy. Alec has a great
looking system like that on his sub “Snoopy”
Greg
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Recon1st@aol.com
Sent: Saturday, August 01, 2009
6:05 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
escape from sub
To me it looks like the
Heinke hood use is marginal at best. The whole idea of an evac is
just not very appealing.
I do not think one should under estimate the cold water. Being up
here in the far north I
can tell you it is a big problem.
I don't think I could
put on my wet suit inside my sub, I have a heck of a time when I have
room. I do however have
a survival suit that I have used. I have spent 5 hrs in the water at
-16 degrees F. The only
time I got out was to cool off. This suit, I think I could get into if I had
too, but am wondering
about the buoyancy of it. If I left the hatch with it on I would for sure
get to the surface in a
hurry. With proper exhalation I would think it would be all right.
In a message dated 8/1/2009 4:31:25 P.M.
Central Daylight Time, hc.fulton@gmail.com writes:
I’ve just studied all that document about Heinke
hoods etc and immersion suits and calculated the time to flood my sub with a
2” valve but had to have a bit of a think about bubble lines and blowing
etc. A bit depressing. Thought I might start designing an aeroplane
instead. One thing though Frank, I think we need to be friendly to all
those ROV operators who could guide an anchor within grabbing reach!!
The other thing which is interesting is that they appear to only flood the
compartment to about 80% ( Bubble line ) then appear to equalize with Air
pressure or is that wrong. They have a Blow term and a vent valve for
equalization of the last part. How about something from one of you chaps
who have actually done the escape! Chs, Hugh
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]
On Behalf Of ShellyDalg@aol.com
Sent: 02 August 2009 03:39
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]
escape from sub
Would it be practical to wear a wet suit ( or dry suit) when
escaping from our psubs? They are hard to put on, but would help keep you warm,
and add buoyancy when at the surface. Why don't they use scuba tanks for
escape? The article mentioned escape from 900 fsw.....OUCH!
Better to stay put and have the means to grab a hook dropped by a
rescue boat. I was thinking a manipulator arm could grab a hook and attach it
to the sub, so you and the sub could be hauled up. How the hook arrived below,
within reach of the arm would need to be figured out, but escaping a downed sub
doesn't sound very good. Frank D.
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