A Survival/Emergency knife is any knife on you at the time of the survival/emergency scenerio. just chose a good pocket knife that best suites your needs, your body and your sense of style. There are SOOOO many good knives out there for these situations, but are you going to have them on you when the time calls? most likley not. a good comfortable pocket knife maid by any repuitable manafacture will suffice. if you have the money get a custom one, if not, visit the bladeforums and post your recquirements for a knife you will be overwhelmed with information