Polar Sundial Functions

 Polar Sundial Functions

To Tell Watch Time

Read Sundial Time to the nearest time line where the gnomon's shadow crosses either time scale. Then correct reading for The Equation of Time.

To Determine When it is the Equinox

When the shadow of the "V" notch on the nodus crosses the Equinox Date Line, the current date is the Equinox.

To Tell High Noon

When the width of the gnomon's shadow is at its thinnest, it is High Noon.