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Where
Runnelstone front mark

Located on Gwennap Head. When lined up with each other, they indicate the Runnelstone, marked by a buoy about a mile offshore. The rear marker should be in sight when navigating from the sea, and should not be obscured by the front red cone.

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Runnelstone buoy
The Runnelstone Buoy

The navigation marks were featured in Hammond Innes’ 1940 thriller The Trojan Horse, in which they are referred to as the “Cones of Runnel”.

Runnelstone rear beacon
Runnelstone Rear Mark