Origin [edit]. The systematic use of belt color to denote the rank was first used by Kano Jigoro, the founder of judo, who first devised the colored belt system using obi (sash), and awarded the first black belts to denote a Dan rank in the 1880s. Previously, Japanese Koryu instructors tended to provide certificates.
Everything for a safe and comfortable trip. Air safety is the theory, investigation, analysis, and categorization of flight failures (aircraft incidents and accidents), and the prevention of such failures through regulation, education and training.
Since the tragic events of Sept. 11, many people use the terms safety and security a lot, especially as they relate to travel. Sometimes the two words are used synonymously. But there is a significant difference between the two words when it comes to air travel. Aviation safety refers to the efforts that are taken to ensure airplanes are free from factors that may lead to injury or loss.