Anna Heyerdahl will sail the Plastiki during the summer . Apprehensive about sailing in stormy weather , but excited by the adventure . The 26-year - old is accompanied by her father , Thor Heyerdahl .
Josian Heyerdahl will join the Plastiki during the voyage . Apprehensive about sailing in stormy weather , but excited by the adventure . The 26-year-old is inspired by her grandfather , Thor Heyerdahl .