A Southern California teenager has serious bragging rights: After docking back in his home state late Thursday morning, Zac Sunderland, 17, can claim to be the youngest person to sail around the world alone. Sunderland was greeted with thunderous applause and congratulations as he arrived at Marina del Rey in his 36-foot sailboat. “It’s kind of crazy to have it done now because, I mean, for the past year I’ve been just fighting for the next ocean, fighting to get back.