Self Steering Phonix III Video

It is generally thought that single-masted boats cant be made to self-steer. But there are plenty of examples of people who have made it happen - the best known being Joshua Slocum.Here is a video showing Phoenix III doing the job, sailing to windward in mild conditions. I guess that many of you may have already seen this video, but I post it for those who have missed the action.In the clip,