A RTÉ radio documentary is set to capture the bravery of the granddaughter of lrish polar hero Tom Crean as she battled katabatic winds, sheer cliffs and some of the roughest seas in the world to follow in his intrepid footsteps.

To mark 100 years since Tom Crean embarked on one of the great feats of navigation, his descendants have decided to travel on the same epic journey, they tell Dan MacCarthy