Paul Larson, the force behind the record breaking Vestas Sail Rocket, was on the James Caird when it retraced the original voyage last year. He said it was a bit strange going from sailing at 65 knots to crossing in a very slow life boat designed 100 years ago.

I don't know if this is in the PBS show or not but there is a video worth watching at http://shackletonepic.com/?page_id=9