Atop A Frozen Surface
There were a few precautions that had to be taken. This is because the temperature at the sea suddenly plummeted and the sea ice forged together to make a bigger form. The ice ended up closing in around the Endurance too. Without any chance for the crew to escape this, the ship was now unwillingly held hostage there on the frozen surface.
The Longest Winter
Since they realized that they were undoubtedly marooned, the crew of the Endurance was grasping the reality of it all. As you can imagine, it was a big blow and was not something to be excited about at all. They were concerned because there was no way they could sail away from the unforgiving cold weather of the Southern Hemisphere. Their plan was falling apart.