Death and Moral

The explores have quite a non-caring attitude towards death, they are aware of that a companion of theirs is going to die, they observe him as he gets weaker but they keep going anyway. They know they have to do everything they can to stay alive, but yet it seems from Scott's writing that they've always known they might die; it's just part of the deal.
Scott writes about Oates' suicide like it's nothing, it seems it isn't something they have any kind of moral problem with, he dies, that's it. All they hope is that they can meet death bravely.