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Horizontal Spot-on dial

  • Design and construction: Piers Nicholson, 2004
  • Plinth donated by Acanthus Cast Stone Products

Spot-on dials create a clear and precise shadow whose outside edge indicates Solar time.

The markings indicate time in 5-minute segments. The slit through the gnomon produces a line of light across the dial at solar noon which indicates the direction of True North.

These features ensure that the sundial can be positioned and therefore read within a minute or two of accuracy.

Reading the dial 

The time indicated by the outer edge of the shadow indicates Solar Time.

 

Where to find this sundial

The Horizontal Spot-on Sundial is number 6 on the map below.