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Water. The American Red Cross Wilderness First Aid courses in 2021 recommend irrigating wounds with at least a liter of potable water, using an irrigation syringe. If you don't have enough potable water, washing with non-potable water is acceptable and you should finish off with potable water. The stronger antiseptic chemicals are indeed antiseptic, but ...


16

When someone is so badly injured that they need immediate professional medical treatment, and you are able to get them that treatment within a day, then wound disinfection isn't a priority. Infections take days to set in, and modern antibiotics administered at the hospital can prevent that from happening. According to several first aid courses I did, trying ...


7

Having perused my well read copy of NOLS Wilderness Medicine (available e.g. through NOLS), there is no mention of hydrogen peroxide use at all. The only two things mentioned for wound cleaning are (1) water, and (2) water with povidone-iodine. Use of a syringe to irrigate the wound is strongly suggested. If you have limited clean water, rinse with untreated ...


4

The Wikipedia article on pearl hunting includes a photo of a diver with no mask in the water. So certainly some diving was done with bare eyes into the 20th century. However this article on Japanese and Korean pearl divers (Scientific American 1967) mentions a century of goggle/mask use. (Note, the article contains uncritical discussion of ...


4

Another low-tech solution for dealing with a severe whiteout is to throw something ahead of you that is highly visible. This generally takes the form of a small, brightly colored stuff-sack (filled with snow or similar) attached to the end of ~5--10m of brightly colored cord or thin rope. Throwing the stuff-sack in the direction you wish to head and ...


1

The design benefit of these emitters is that the brightness comes from a much smaller area. This means that the optics can focus the light into a smaller spot. There doesn't, at the moment, seem to be an efficiency benefit over the best LEDs, except perhaps in low power modes. This is partly because current designs are optimised for maximum brightness. ...


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