Re: [PSUBS-MAILIST] Distress Buoy

[MerlinSub@t-online.de]

We use also a stuff similar to dyneema for our reel
- but we never dive a midget sub to 2 knots currents.. 

Or trigger is a trough hull axis which can be turned 90 degree. 
A lever on both sides. A spring on the outside. You open the trigger with your foot against the force of the spring. So you can stop the process any time. 

If you are downed in lake in 30 feet deep it makes not much 
sences to release 300 feet of rope. And makes a diver worry which wants to go down on this rope.. 

If the bouy is on the way to the surface you can clear hear the turning reel. Otherwise make a small bell on it.. If the bouy reach the surface the reel stops. Trigger back to fix it. Thats is. 

best regards Carsten 


"Antoine Delafargue" <antoine.delafargue@gmail.com> schrieb:
> What about the trigger: A mechanical through hull?, an electric one? a
> magnet switch (like on some DPVs)?
> 
> I am thinking, for the length of the line, if you have currents around 2knt
> and are stuck at the bottom, the buoy could sink if your line is shorter
> (experienced with lobster traps where the line length was more than twice
> the depth). You can test it by trailing it with the sub moving. At the same
> time if your depth is 300m, that is a lot of line! An emergency acoustic
> pinger might be better, if you do not have the room offboard for a line
> strong enough to lift the sub.
> For the line material the best resistance/diameter I know is kite surf 2 -
> 2.5mm dyneema (I don t know the US name for it) expensive though.
> http://www.cousin-trestec.com/cordage-fr/cordage-parapente-kitesurf/suspente-kitesurf.php
> 
> 
> Antoine
> 





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