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From: PJ Rattenbury <ratten_at_uow.edu.au>
subject: [Paddlewise] Inflatable PFDs
Date: Mon, 13 Dec 1999 10:10:48 +1100
	Anyone used one of these in a kayak rescue emergency?  Pros and cons?

	They seem to be gaining favour with yachties here in Australia because
they can be incorporated in a storm parka without adding too much bulk. 
	I was intrigued by a PaddleWise post which suggested they could be
unsuitable for kayak emergencies because of their shape and bulk when
inflated.  Just when you want them to perform!  Can they be deflated after
use  in a  successful re-entry after a wet exit? 
	Do you carry spare CO2 cartridges.  How fiddly are these things when you
have cold and numb fingers?
	
	At first blush, any gear which reduces weight and bulk is obviously good
news, but is the Co2 cartridge just another gadget which cannot be counted
upon in an emergency? 
	Has anyone relevant experience? 
	PJ
	Wollongong,
	Australia 


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From: Allan Singleton <allan.singleton_at_voyager.co.nz>
subject: Re: [Paddlewise] Inflatable PFDs
Date: Tue, 14 Dec 1999 14:01:46 +1300
From: "PJ Rattenbury"
Subject: [Paddlewise] Inflatable PFDs


> Anyone used one of these in a kayak rescue emergency?  Pros and cons?
>

In a previous life where I had to work for a living running a hydrological
survey team, we used inflatable PFDs when working from boats to avoid the
bulk of a conventional PFD. We also used them when wading in rivers where
there was a possibility of being swept off your feet, as a normal PFD would
give you lift when you did not want any.

We held a safety exercise once with another team, where, amongst other
things, we tried inflating the PFDs and swimming. The model that we had gave
adequate buoyancy without unduly restricting movement, but the other team
had ones with much more buoyancy, and swimming was difficult. In NZ, where
PFDs are called lifejackets, and are approved for different yachting
categories, a Cat 1 Offshore jacket has more buoyancy than a Cat 2-3-4
Sheltered Waters jacket.

It turned out that our PFDs were Sheltered Waters ones, the other team's
were Cat 1. You would have difficulty re-entering your kayak with a Cat 1
model inflated.

The other thing to avoid is the automatic inflation model. You don't want it
to inflate when you are trying to exit the beach through a wave!

If you look at the website for Safety at Sea Australasia Ltd,
www.safetyatsea.co.nz and look for Sospender lifejackets you will find an
Offshore and a Sheltered Waters model. Other models available here come from
Hutchwilco and RFD, but I couldn't find websites for them.

I think changing a CO2 cartridge on the water would be dicey. You could
probably deflate the bladder and get it more or less back in place under the
cover, but if you needed it again you would have to blow down the tube to
inflate it. If conditions were such that you wet exited though, you would
probably want to leave it inflated while you concentrated on staying upright
and pumping out.

Allan Singleton

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From: Ferdinand Soethe <F.SOETHE_at_OLN.comlink.apc.org>
subject: Re: [Paddlewise] Inflatable PFDs
Date: Tue, 14 Dec 1999 08:15:51 +0000
Hi PJ, 

we own two of these inflatable ones and found them very useful in a foldable 
kayak in hot climate. We took a spare set of CO2-cartridges just in case and 
took the mechnism apart at home to be sure we knew how they worked.

In Germany you can only get the automatic type with salt tablet triggers. So to 
prevent inflation on entry and exit in deept water we disabled the automatic 
trigger, which was also the only fiddly part of the mechanism (inserting a salt 
tablet). All the rest is fairly simple should be easy to perform in rough 
conditions. 

Ferdinand


> 	Anyone used one of these in a kayak rescue emergency?  Pros and cons?
> 
> 	They seem to be gaining favour with yachties here in Australia because
> they can be incorporated in a storm parka without adding too much bulk.
> 	I was intrigued by a PaddleWise post which suggested they could be
> unsuitable for kayak emergencies because of their shape and bulk when
> inflated.  Just when you want them to perform!  Can they be deflated after
> use  in a  successful re-entry after a wet exit?
> 	Do you carry spare CO2 cartridges.  How fiddly are these things when you
> have cold and numb fingers?
> 
> 	At first blush, any gear which reduces weight and bulk is obviously good
> news, but is the Co2 cartridge just another gadget which cannot be counted
> upon in an emergency?
> 	Has anyone relevant experience?
> 	PJ
> 	Wollongong,
> 	Australia
> 
> 
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> 
> 
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From: Rainer Schroeter <kayaker_at_gmx.de>
subject: Re: [Paddlewise] Inflatable PFDs
Date: Thu, 16 Dec 1999 13:18:09 +0100
Hi Ferdinand,

I am just going to by those inflatable vests for our trip to Thailand in
February.

> In Germany you can only get the automatic type with salt tablet triggers. So to 

Thats not quite right, you get the ones without the automatic trigger
f.e. from secumar (German brand) and they offer some especially for
paddlers (very short version).

> prevent inflation on entry and exit in deept water we disabled the automatic 
> trigger, which was also the only fiddly part of the mechanism (inserting a salt 

There are different systems on the market. Some are very easy to disable
(f.e. bfa-vests).There can screw off the automatic trigger completely
without disabling the hand-trigger


--
Rainer Schroeter, Marburg, Germany
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