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The Global HF System (GHFS) was stated by the US Air Force in June of 1992. This system was created by consolidating several other USAF HF networks, including the Strategic Air Command "Giant Talk" system. The goal of the system was to develope a worldwide HF network for providing Command & Control HF communictions to all authorized DOD aircraft and ground stations.
Acrylic acid (IUPAC: prop-2-enoic acid) is an organic compound with the formula CH2CHCO2H. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform. More than one billion kilograms are produced annually.