It is difficult to imagine how anyone would enter into a polar or mountainous region unprepared. You're prepared for your journey or you arrive by accident. Planned travel in a cold or mountainous environment should mean that you are well clothed and equipped. In both winter and summer, the Northern Arctic offers an abundant supply of water and food. The real threat comes from the cold, injury, and simply doing nothing. The SAS Guide to Arctic and Mountain Survival provides details on what to do immediately after your arctic or mountain survival situation has arisen.