Printed and laminated a prototype of my solar slide rule on 350g A3 at the local print shop and it works fairly well! Correcting sextant height for index error, temperature, refraction, height of eye and lower limb is fast, as is computing latitude from the noon sight. Computing Hc and Z is a bit more involved (using additional scales on the reverse side)

The combined Latitude, Declination, LHA grid didn't work, so instead I've added the normal S/ST, and T/T1/T2 scales to allow computation of Hc and Z from the corrected sextant height.

Is this not a reasonable place to park?

Following up on the original question... Concise Products in Japan seems to still be producing circular slide rules https://www.sliderule.tokyo/products/detail.php?product_id=7

Meanwhile in Amsterdam

But FORTRAN is forever. #HPC

Moore's Law illustrated. #HPC

It's boating season again!

Always be prepared with a spare bicycle.

That appears to correctly compute sin(declination)*sin(latitude) now