On Sun, 18 Apr 2004 10:32:41 -0400, DSK wrote:
Kind of makes me wonder... why haven't we seen any tungsten keel bulbs
in really hi-dollar boats, like say for example the America's Cup?

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It's written into the sail racing rules that you can't use any ballast
material with a density greater than lead. That rule was implemented
back in the 70s or early 80s to head off several designs that planned
to use depleted uranium as a keel material.

No problem for cruising boats however :-) The DU is readily
available but I believe you need a permit to buy it.