31 Random Survival Number Facts

Random Survival Related Number Facts

Knowledge is your BEST tool in any Survival Situation. Knowing random facts is a good thing. Here are a few:

4 drops of bleach to treat 1 quart or liter of water
80% of the earth’s surface is covered with water
3 years equals the official shelf life of MREs
Add 37 to the number of chirps a cricket makes in 15 seconds and you’ve got the approximate outside temp
3 is the number of people you should tell where you are going when leaving for an adventure
8000 feet is when people typically start feeling the effects of altitude sickness
72 hours is how long your Emergency Bug Out Bag should be good for
550 lbs is the tensile strength of military spec parachute cord
66% of the human body is water
30+ equals the uses for a bandanna in a survival situation
8 cups equals the daily recommended amount of water
16 drops of bleach to treat 1 gallon of water
1% of total water amount is what has been lost by the time a person feels thirsty
75% of the human brain is water
83% of human blood is water
4000 cases per year of illness due to drinking water contamination in US
30 days is the approximate time one can live without food
70 gallons is how much water a Birch tree gives off in evaporation per day
1% of the earth’s water is suitable for drinking
30 & 50 degrees: The temperatures between which most hypothermia cases develop
7 is the number of strands inside of military spec 550 parachute cord
3 is the universal signal number for distress – Sets of 3
1 WHISTLE BLAST is International Whistle Code for “Where are you?”
2 WHISTLE BLASTS is International Whistle Code for “Come to me.”
3 WHISTLE BLASTS is International Whistle Code for “I need help.”
59-60 is the Rockwell Hardness Value (HRC) of a Mora Knife Carbon Steel Blade
5 days is the approximate time one can live without water
400 Denier notates the mass (in grams) of 9000 meters of the yard which is woven to create 400 Denier Nylon – a VERY popular fabric in the outdoor industry
8.35 lbs is the weight of 1 gallon of water
3 dots is equal to 1 dash in MORSE CODE
2 Iodine Tablets Purify 1 Liter of Water