Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Situation awareness, or SA, is the perception of environmental elements within a volume of time and space, the comprehension of their meaning, and the projection of their status in the near future. It is also a field of study concerned with perception of the environment critical to decision-makers in complex, dynamic areas from aviation, air traffic control, power plant operations, military command and control to more ordinary but nevertheless complex tasks such as driving an automobile or motorcycle.