Figure 10-7.  System stressors. Environmental, physiological, and psychological stress are factors that affect decision-making skills.  These stressors have a profound impact especially during periods of high workload. Use of Resources Chapter 10: Aeronautical Decision-Making and Judgment  Situational Awareness  To make informed decisions during flight operations, a pilot must also become aware of the  available resources. Since useful tools and sources of information may not always be readily  apparent, learning to recognize these resources is an essential part of ADM training. Resources must  not only be identified, but a pilot must also develop the skills to evaluate whether there is time to  use a particular resource and the impact its use will have upon the safety of flight.  Situational awareness is the accurate perception and understanding of all the factors and conditions  within the five fundamental risk elements (flight, pilot, aircraft, environment, and type of operation  that comprise any given aviation situation) that affect safety before, during, and after the flight. Maintaining situational awareness requires an understanding of the relative significance of all flight  related factors and their future impact on the flight. When a pilot understands what is going on and  has an overview of the total operation, he or she is not fixated on one perceived significant factor. Not  only is it important for a pilot to know the aircraft’s geographical location, it is also important he or she  understand what is happening.  Fatigue, stress, and work overload can cause a pilot to fixate on a single perceived important item  and reduce an overall situational awareness of the flight. A contributing factor in many accidents is a  distraction that diverts the pilot’s attention from monitoring the aircraft.  Effective workload management ensures essential operations are accomplished by planning,  prioritizing, and sequencing tasks to avoid work overload. As experience is gained, a pilot learns  to recognize future workload requirements and can prepare for high workload periods during  times of low workload.  In addition, a pilot should listen to ATIS, Automated Surface Observing System (ASOS), or  Automated Weather Observing System (AWOS), if available, and then monitor the tower  frequency or Common Traffic Advisory Frequency (CTAF) to get a good idea of what traffic  conditions to expect.  63 Remote Pilot – Small Unmanned Aircraft Systems Study Guide  Workload Management Obstacles to Maintaining Situational Awareness