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Re: [PSUBS-MAILIST] Buoy release



Hi Frank D
How about as a release mechanism using a super magnet inside the hull thus eliminating the need for an extra through hull a normal fishing yo yo spool with 160 lb line with an  thin elastic band trip an epirb that switches it self on as it exits its holder and which is connected to a buoy with a small strobe  and on the buoy is clearly written that it is attached to a psub in distress the thought of getting stuck in soft silt or mud and because of this not been able to drop your weights has crossed my mind on the other hand why not take a 1ton lift bag vacuum fold it in a bag attached to the outside of your hull to one of your lifting eyes with a d shackle a flexible air pipe from the inside of the bag via a through hull to your air source inside the hull in other words save yourself.
all the best
Glen SA
 
----- Original Message -----
Sent: Saturday, August 08, 2009 8:57 PM
Subject: Re: [PSUBS-MAILIST] Buoy release

I've been thinking of that buoy release Dean mentioned, and I like it. He proposed a simple turned down wooden closet rod, with fishing line wrapped around it's turned down middle section, and sealed up so it doesn't get water logged.
My thought is to use something like that, and have it encased in a two inch pipe sticking into the hull near the sub's top with a  welded bottom cap. The pipe ( of course ) will be connected to a ball valve and to release the buoy, just open the ball valve and the buoy will float up, unspooling the fishing line as it ascends. With a 2 inch pipe/valve there is enough space to make a buoy a little more sophisticated than just a closet rod. I was thinking along the lines of a buoy with a light on top, and maybe an antenna and signal device built in, about the size of a flashlight. The device can be turned on at the beginning of each dive and stowed in it's release tube.
Like the dive lights in my dive planes, the batteries will be simple "D" cells giving me easy access and cheap replacement, and no thru-hulls or wiring to deal with. Just put fresh "D" cells in there when I dive and turn them on when launching. If I will be going up and down all day, It's real easy to just pull the dive lights out of the dive plane "wings", pop in new batteries, and stuff the dive lights back into the wings. Same with the buoy. I would expect the batteries in the buoy to last several days, with just a low power LED for a beacon, and an intermittent signal sending unit. The fishing line cable will need to be pretty small, but is not used for leading a grapple hook down so only has to hold on to the buoy and could be 1000 feet long with room to spare. Plus, It's cheap and easy to replace the line during regular maintenance. Now, I won't be able to reel it in from inside the sub, but I don't see that as being very necessary, as a buoy release only happens when you're in serious trouble. Got any thoughts on this ? Frank D.
 



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