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I forgot to add that the usual primary purposes of
hard tanks is also for final submerging as well as trimming.
But then some designs use sliding weights on the
keel to trim with instead of tanks and then the hard tanks
are only used for final submersion. So you see Joe,
you know WHAT the terms mean now, but it doesn't
necessarily mean you have to use them that way in
your design. You are unlimited in your design ideas
as long as you overcome buoyancy and weight and
build something a size you will be happy with and it is safe..
Bill.
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