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Re: [PSUBS-MAILIST] RE: payload



Thanks Alec. Changes in salinity and density do occur, but you're right....not much change.
I've heard of salty layers in the ocean where the density change is noticeable, like places where fresh water is pouring into the ocean at river mouths or glacial melt, and sometimes pockets of really salty water not mixing with surrounding water.  
A small trim tank of say 10 gallons should be enough to adjust for any differences encountered during a dive. The main adjustment must be made in static ballast ( lead weights ) before you go down.
I would think two trim tanks to shift weight front to back would be better than one, or maybe moving your drop weight a little would be easier.
Frank D.
P.S. Still waiting for my steel! Gettin' a little frustrated.