Field Notes
Written knowledge from the same domains the device carries offline. Readable here, stored on it.
How Many Hours Without Sleep Before Hallucinations and Dangerous Impairment Begin?
Dangerous impairment starts much earlier than hallucinations. Williamson and Feyer (2000) found that after 17 to 19 hours awake, perform...
STAY ALIVEHow Long Can You Survive Without Food and Water Together?
Short answer: without food and water together, survival is measured in days, and the missing water sets the limit, not the missing food. ...
STAY ALIVEWhy Animal Trails Aren't Always Safe to Follow: Reading Game Paths for Danger
Game trails can lead to water and passable ground, or funnel you into predator habitat, bog and steep terrain. How to read a trail before...
STAY ALIVEHow to Start a Fire in Wet Conditions: Techniques That Actually Work
Starting a fire when everything around you is sodden is a different skill from lighting a dry practice log. It comes down to targeting fu...
STAY ALIVEHow to Make Strong Cordage from Plant Fiber: Processing Steps and Best Plants
Twisting a plant into a cord is not the same as making cord that holds a load. The processing steps that separate the two, and which plan...
STAY ALIVEHow to Sharpen a Knife in the Field Without a Whetstone
You don't need a whetstone to restore a usable edge in the field. Improvised surfaces work, and the difference between sharpening and pol...
STAY ALIVEHow Cold Does It Actually Have to Be to Get Hypothermia?
Hypothermia is not only a blizzard problem. CDC and wilderness-medicine guides put the practical danger zone at 30–50°F (−1 to 10°C) when...
STAY ALIVEHow Long Can You Survive Without Sleep?
No one has been medically confirmed to die purely from staying awake. What the best-documented cases, including Randy Gardner's 264 hours...
STAY ALIVEReading Terrain and Weather Before You Need To
Most outdoor weather lore has no predictive power. A small set of observations does, because each one rests on a real physical mechanism.