I thought they would us one of those huge USAF transports to punch thru and not a float plane I see on canoe trips!!
They have tried using Hercs before but as with the first mid-winter rescue flight in 1999, they weren't up to the cold weather conditions where the fuel can freeze up at -60*C. In these planes, I think the fuel is actually kept in the cabin and heated for the cold temps which is why they fly with minimal crews. I believe this is the 3rd or 4th time that this same company has provided these emergency flights. One crew crashed and perished on a previous expedition. The planes are extreme cold weather specialists and actually tend to over heat on the trip down to Antarctica.
I remember the 1999 trip to rescue the only doctor from the South Pole (breast cancer), the plane had to do multiple short hops from the northern arctic (CFS Alert 82d29'N 62d20'W) to the south pole. That trip took them almost 2 weeks and then they flew back to Alert when finished! Virtually Pole to Pole to Pole. The crew were awarded by the Canadian government for their role.
My sincere kudos to the pilots who made these journeys as flying at night with only a bit of moon light to navigate the rugged ice & mountainous terrain from Rothera to the pole (2400+ kms). They have 24 hour nights at this time of year. 2 planes made the journey to Rothera British Station (67d34'N 68d07'W) and one went to the pole with the other used as a backup.