I have read several books about survival and outdoor field craft skills. Many of these books suggest building a survival kit out of an Altoids tin or something similar. These kits include very basic ...
Under the assumption that an emergency kit like the ones listed here are for the emergency of getting lost and being stranded for days, how necessary is a knife sharpener?
Lensatic Compasses seem to be priced from $5 to $100 USD. What features should I look for when buying one?