The World's Most Accurate SlideRule -- Eximius Diu 6

Image Copyright David Hoyer
Reproduced with Permission

We are fortunate to live in a post retro slide rule era where creative minds can ponder how to construct a better slide rule (sort of like a better mouse trap, I suppose).  The new leader at the end of 2012 in this obscure endeavor is Dave Hoyer of Encore Consulting down under in Sydney, Australia.
The Eximius Diu 6 "spiral diameter is 750 mm (29.5"), with 135 spiral turns giving a scale length of 175 m (574 ft).   Due to the nature of spiral slide rule scales, this is equivalent to a linear slide rule of length 318 m (1043 ft)."  This allows the computation of results that are accurate to 6 decimal places.