A On 1 8th October 2009, Australian schoolgirl Jessica Watson set off from Sydney Harbor on an unusual journey. At just sixteen years old, she was trying to become one of the youngest people ever to sail （航行） around the world all by herself. Her journey on the yacht （帆船） took 210 days , and she completed it without making any stops or receiving any help. Jessica's journey “covered nearly | 23,000. nautical miles（ 海里）. It wasn't- always smooth---passing. through the Pacific, Atlantic and Indian Oceans, she had to deal with strong rains and big waves, as well as loneliness and boredom. Sometimes her yacht got damaged and she had to make the repairs herself.