Brewing beer is actually quite easy and, its a free (as in beer) pastime. Yes the supplies might cost money and time, but the methodology is as old as civilization; thusly public domain. The basics are simple and provide a means of making good beer that you can enjoy, share and trade.
The mobile radio is a tried and true method for communications in the field. Modern technology has increased range and clarity while also allowing for add-ons like voice scrambling. The FCC regulates and licenses some of the more "prime" radio frequencies, but with the demise of UHF Analog Television Broadcast, there are now other frequencies that are available.
Which one should be used and why from a users perspective.
Quick-Clot (US Based) made by Z-Medica uses Kaolinite which is a kind of clay and cannot be broken down by the body. When I have seen it used, it has burned on contact and needed to be cleaned out of the wound later. DoD users have reported difficulty in gaining formulaic documentation from the manufacturer.
Celox (UK Based) made by Celox Medical uses Chitosan, a natural polysaccharide, and is broken down by Lysozyme (found in human tears, saliva and mucus) into glucosamine (a natural sugar). It does not set off a clotting cascade, but clots the red blood cells it comes in contact with. From what I have seen it does not burn on contact and does not need to be cleaned out of the wound. I have no DoD information, but it is mandatory medical kit for the U.K. Military.
Personally - I'll take Celox over Quick-Clot.
There are many reasons to plant a hedge row instead of building a fence such as: