Your holidays begins and...

Your plane crashes on an uninhabited island and you wait for rescue, but the island is not empty, and they try to hunt you and there are ruins from thousands of years ago, and invisible monsters and strange machines and hatches and a dog and if you don't push a button the world will cease to exist. What do you need the most? What is the only thing you NEED?

This map with all the locations and important points to survive until help arrives.... if it arrives ...

You are lost my friend!