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  Oliver Kierse said:-
> With regard to your suggestion about using sand ... you would probably end
> up breaking some local bye-law concerning aggregate removal from public
> beaches and Daily Rag headlines 'Beach disappears - divers blamed'.

  Not if the divers emptied their ballast-belts afterwards where they filled
them.

> However, this lead (pun intended) me to look at other materials that might
> have an application as weight belt materials.
> Material    Density (Kg/m3)            Application ...
> [and the merits of Hg, Am, Au, Cm, Pu, Pt]
  Neptunium  (a bit more than Pu)        the King of the Sea's own choice?
  The densest element is osmium c.23000 Kg/m3, and iridium is nearly the same.
  Element 108 has been found and named hassium (Hs): named after our Hans?
  (In reality: I heard once of a UK naval experimental drysuit warmed by the
decay heat of 0.75Kg of Pu-238 (not the usual Pu-239): for some unexplainable
reason they had great trouble getting someone to dive in it to test it.)

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