Pocket Knife
Pocket knives are necessary in almost any survival situation. Whether you are stuck on a raft in the middle of the ocean and need to fend off predators, or you need to build a shelter in the forest, a pocket knife will give you what you need to increase your chance of survival. Knives can be used for hunting, defending yourself or utilizing your environment to build a shelter. Shelter and food are keys to survival; without a pocket knife, these necessities can be extremely difficult to attain.
Matches
Whether dogged out in a frigid environment or in boiling desert heat, matches will help you cook food, boil water and stay warm. Even in the scorching climate of the desert, a fire is often needed at night to keep warm. Temperatures in the deserts of southern Arizona, for example, can range from an average of 87 degrees Fahrenheit in the day to 43 degrees at night. You'll also need the matches to cook any food you catch, and to boil and kill any bacteria in your drinking water. In almost any environment, dry timber or grass can be found to fuel your fire.
Rope
Rope can mean the difference between life and death. You can use rope to make a hunting trap, or to climb down a steep cliff. Either way, keeping some of this easy-to-carry tool can increase your chances of survival. Rope can be used with elements in the wilderness such as a stick and a rock to create a simple trap and to kill animals for supper. You can also use the rope to make fires by creating a pulley system that you can use with sticks to make a spark.
Can
In any survival situation, you need water. People can go weeks without food, according to Survivaltopics.com, but water is needed almost every day. As you become dehydrated, you will need a can to boil any water that you find. This will sanitize the water for drinking. Even water from rivers and lakes is prone to filthy infestations that can make you sick, and that could be deadly in a survival situation when you need all the energy you can get.