Revan,
This is another hard-shell BC, but without the constant volume that the Dacor Nautilus CVS used. It was manufactured by White Stag for just a little while. It is simply a repository for air, at ambient pressure. Add the air, and if you want to remove it, simply do a surface dive and it flows out holes in the bottom of the unit. It is a very simple unit, but actually fairly effective. It has about 15 pounds of buoyancy.
Concerning the Dacor Nautilus CVS, it was patented in September 1978, and so is now available for copying. It would be fairly easy to get a smaller one, such as the White Stage version, into a CVS by simply adding a small regulator, a water intake valve, and overpressure relief valve. Here is the Dacor CVS patent. Here's a short video of me using the Dacor Nautilus CVS with a double hose regulator. This will also give you an idea of the currents I deal with in the Clackamas River.
SeaRat
This is another hard-shell BC, but without the constant volume that the Dacor Nautilus CVS used. It was manufactured by White Stag for just a little while. It is simply a repository for air, at ambient pressure. Add the air, and if you want to remove it, simply do a surface dive and it flows out holes in the bottom of the unit. It is a very simple unit, but actually fairly effective. It has about 15 pounds of buoyancy.
Concerning the Dacor Nautilus CVS, it was patented in September 1978, and so is now available for copying. It would be fairly easy to get a smaller one, such as the White Stage version, into a CVS by simply adding a small regulator, a water intake valve, and overpressure relief valve. Here is the Dacor CVS patent. Here's a short video of me using the Dacor Nautilus CVS with a double hose regulator. This will also give you an idea of the currents I deal with in the Clackamas River.
SeaRat
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