There are many things to learn about survival in Antarctica. You always look for cracks in the ice. You also must watch for groups of seals lying around on the ice because they come up through openings in the ice to breathe. So, seeing seals is a sign of a possible bad crack. Every vehicle contains a hand-powered ice drill, and you need to drill often to test the thickness of the ice.
Cracks also open in glaciers as glaciers move slowly downhill.
Because of this, scientists who cross snowfields and glaciers must learn to rescue someone who falls into such a crevasse. One important lesson learned in Happy Camper school is how to build various kinds of snow shelters. The shelters are for sleeping and cooking and for taking care of anyone who may have hypothermia or frostbite and need to be kept warm. These shelters may take several hours to make, but they are worth the work. It can take only minutes to become seriously cold in Antarctica.