In article ,
John Rowland wrote:
Tom Anderson wrote:

Anyway, my proposal is for *all* heights to be measured as distance
from the centre of mass of the earth. SOLVED!

Why not measure heights from the centre of mass of the earth-moon system?
That would abolish the need for tide tables because the tide would be at a
fixed height... although the land would go up and down.

Notice the way in which the sea stays steady as a rock whilst the
buildings keep washing up and down.

Nick
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