Ben had some good ideas. Hiking in the back mountains of Cape Town can sometimes be tricky as being off the beaten track it is not often you will see anyone. I suggest flares to light up the night sky to attract overhead planes. Also a really powerful long range torch (flashlight) is a must as it will also light up a huge part of the mountain and this will ensure one’s safety. Condoms! Yes but it is not what you think – condoms come in handy to waterproof bandages or protect and prevent irritating blisters. Also handy to keep items like your cell phone waterproof. Chapstick – great for soothing burns and bites and takes the itchiness away. Spare socks.
If you must take regular medications for a medical condition, you’ll likely want to pack an extra set in your survival kit. You’ll need to discuss the issue with your doctor if you require prescription medications, but don’t forget about over-the-counter medications you may need too. For example, if you often suffer from heartburn, you’ll likely want to add some antacids to your survival kit. Similarly, if you have allergies, you’ll want to pack extra antihistamines, and you may even want to include an EpiPen if an anaphylactic shock is possible.
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Individual survivalist preparedness and survivalist groups and forums—both formal and informal—are popular worldwide, most visibly in Australia, Austria, Belgium, Canada, France, Germany (often organized under the guise of "adventuresport" clubs), Netherlands, New Zealand, Russia, Sweden, the United Kingdom, and the United States.
One of the best wilderness survival tactics you will ever implement is to think ahead and prepare yourself for the likelihood of being in a survival situation. Whether you raft on the Yukon River’s rough waters or head for Alaska where for an unforgettable backpacking trip through the Alaskan wilderness, preparing for the “just in case” situations is necessary.
The format is fairly standard for a "reality documentary". It does go with the more extreme folks rather than the more common folks who are just putting some things aside for rougher times. But that's OK, in most of the cases. I found many of the people to be pretty ingenious in how they've approached what they perceive to be The End Of The World As We Know It. Maybe they're right, maybe they're wrong. A few might even be slightly over the top (well, there are a few that I think put a step ladder on the top and went from there...) But they have what they consider to be valid reasons for doing what they're doing, so who am I to argue?
In tropical areas, a survival kit may have mosquito head netting, additional insect repellent, anti-fungal cream, a machete, water purification tablets, foot powder, matches, a flint strike, a compass, a wire saw, a space blanket, medical equipment (gauze pads, elastic gauze bandage, antiseptic creams, anti-malaria tablets, anti-infection tablets, bandages, etc.), salt tablets, a fishing kit, snare wire, extra socks, a candle, a signal mirror, flares, a sewing kit, safety pins, tinder, tape, a whistle, and rations.
Astronauts are provided with survival kits due to the difficulty of predicting where a spacecraft will land on its return to earth, especially in the case of an equipment failure. In early US space flights, the kit was optimised for survival at sea; the one provided for John Glenn on the first American space flight in Friendship 7 contained "a life raft, pocket knife, signaling mirror, shark repellent, seawater desalting tablets, sunscreen, soap, first aid kit, and other items". A survival kit was provided for the Apollo program which was "...designed to provide a 48-hour postlanding (water or land) survival capability for three crewmen between 40 degrees North and South latitudes". It contained "a survival radio, a survival light assembly, desalter kits, a machete, sunglasses, water cans, sun lotion, a blanket, a pocket knife, netting and foam pads".
Survivalists maintain their group identity by using specialized terminology not generally understood outside their circles. They often use military acronyms such as OPSEC and SOP, as well as terminology common among adherents to gun culture or the peak oil scenario. They also use terms that are unique to their own survivalist groups; common acronyms include:
Nail your studs together in lengthwise pairs at a 90-degree angle to form braces. This makes them stronger. Then run three or four braces horizontally across every door, hammering the nails from above and below directly into the frame at a 45-degree angle. If you drive them straight in, they're easier to pop out when somebody kicks the door. Use more braces to secure the drywall over the windows. Try to use longer nails and leave a couple inches of each nailhead sticking out for easy removal. — Clint Carter