CNN 's CNN speaks with British round - the - world sailor Dee Wallace . She is the only woman to have sailed around the world in both directions . Lack of sleep and hunger are the main challenges , according to Caffari . Desire , preparation and self - control are the keys to success , Caffari says .
CNN 's MainSail speaks with British round-the-world sailor Dee Caffari . Caffari is the only woman to have sailed around the globe in both directions . Lack of sleep and loneliness are the main challenges , according to Caffari . Desire , preparation and self-belief are the keys to success , Caffari says .