Munter, who says when her racing career is over she'll be a scuba diving instructor, e-mailed CNN.com saying it was important for her to fly halfway around the world to get out the message of the film.

CNN: She's racing to save the environment

The 69-year-old was chief instructor of the joint services diving school before he retired from the service in 2000.

BBC: Diver John Smith

When he was appointed chief instructor for the tri-services diving school, he adopted BSAC's method of teaching.

BBC: Diver John Smith