Monitor Wind Vane Self Steering
Attention is rarely needed to steer our Saugeen Witch. Instead, we use a purely mechanical device that tirelessly steers night and day using only the wind and our motion through the water.
Our device is a Monitor Windvane by Scanmar
http://www.selfsteer.com/products/monitor
It works great through most points of sail and conditions down to about 5 knots of wind.
This video was taken on passage from Morocco to the Canary Islands in 2011.
Sailing stories at http://www.fgood.org/sailing/