According to the Principle of Three, you have about three hours to get yourself a shelter if you find yourself in a survival situation.
Obviously, that time amount varies and depends on your immediate situation; if you are stranded in a tropical area, you probably have a bit more time, but in a sub-zero environment, three hours might be pushing the window of survival.
But as a rule, three hours to get yourself a basic shelter is a good way to prioritize your survival checklist as you formulate a strategy to make it through.
Luckily, depending on your situation, you usually will have a lot of options; even someone unprepared has a slate of shelters to choose from if they are innovative and resourceful.
To see the most common types of survival shelters as well as advice on when to use each one and how check out the next page.