NavList:

My goal has been creating a Circular Slide Rule capable of  just 4 - digit multiplications/divisions usable for CelNav and designed such that it can be build by a dedicated hobbyist with good but modest tools.

I cannot make out from the picture if ATLAS's long scale is a spiral but the text in Greg's link appears to be saying so. My SCALE1 may be used as described there, I believe. My color schemes, though, are additional tools for estimating more quickly on which turns of the spiral the factors and the result may be found. I suppose the yellow background of some turns on the ATLAS is meant for the same purpose -  I would like to know more about that. Without such a tool it takes quite long to locate the numbers. Perhaps you can find a particular clever method - better than ATLAS or me.

I owe you still a detailed description of using my designs - I ask you for  your patience, though. However, I can see from your notes you might already be researching your own ideas of using them. Great!

H