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Hi All -

I recently got a copy of Mike Pepperday's "S" table and liked several
of it's features - a more discursive explanation than the usual from
the government printing office; having a decimal point to keep the the
logarithms aligned; the fact that he calls his logs "help numbers" I
think shrewd - i find even seasoned sailors get queasy when they hear
the 'L' word.

Also liked that Pepperday followed Ageton and Dreisenstock in showing
the divided triangle and the formulas. I've thought from the outset
that the NAO table would be aided considerably by inclusion of a
labeled drawing of the divided triangle.

Since "S" is obviously a log table I thought it would be interesting
to see what the base of the logs was. It isn't 10 and it isn't 2 and
it isn't 'e'; seems to be 11.5, though I only checked at .5, 25, 30
and 45 degrees.

Doing this made me wonder how a log table is made. Do you have to slog
by trial through 90 degrees 1' of arc at a time or is there another
way?

I figure someone in this forum will know how.

Thanks, Hewitt

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