Yet another thought.
Calculate the amount of air/water required for various depths and build
several tanks.
Calculate the amount of air required to push the water out of each tank at
the maximum depth.
Flood different combinations of tanks for different depths.
Over blow the tanks with compressed air from a storage cylinder to rise

kiss

by.
> -----Original Message-----
> From: Olin Lathrop [SMTP:olin_piclist@COGNIVIS.COM]
> Sent: Friday, 20 October 2000 4:45
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [EE]: Help water level
>
> > Actually the issue is not the depth of the sub (I already have depth
> sensors
> > using pressure on the sub), this issue is providing closed loop control
> over
> > the amount of water in the ballast tank.
>
>

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