Navigation with sextant
Getting to grips with old methods of navigation is proving to be really tricky.
If the team miss South Georgia then they will be blown out into 3000 miles of open ocean.
Rough seas The team have a relentless battle to try and stay on course.
Battered by the wind and rough seas can the complete their mission or just get lost at sea?
Snow built up
Snow starts to fall as the temperature drops to below zero, it could mean trouble for the crew if the sails become too bogged down with the weight.
- GeoGarage blog : Shackleton death or glory rough seas / Ernest Shackleton voyage to be retraced by modern-day Antarctic explorers
- LiveScience : Recreating an Epic Antarctic Journey: Q&A With Explorer Tim Jarvis