1.1 This guide is intended for two distinct readers: educators who wish to develop curricula and training courses and individual pilots wishing to raise their knowledge level for particular flight operations. The guide describes the knowledge, skills, and abilities required to safely operate unmanned aircraft for commercial purposes. A Civil Aviation Authority (CAA) may, at their discretion, use this guide to aid the development of existing or future regulations. This guide addresses powered fixed-wing, vertical-take-off and lift and rotorcraft UAS and not other potential unmanned aircraft categories (for example, glider, lighter-than-air, etc.). 1.2 An unmanned aircraft system (UAS) is composed of the unmanned aircraft and all required on-board subsystems, payloads, control station, other required off-board subsystems, any required launch and recovery equipment, all required crew members, and command and control (C2) links between UA and the control station. 1.3 This guide provides fundamental general knowledge, task performance and knowledge, and activities and functions for remote pilots of lightweight UAS (but not necessarily limited to UAs under 55 lb Gross Take Off Weight) or for certain CAA operational approvals using risk-based categories. Flight operations outside the scope of this guide require additional knowledge, experience, and training. 1.4 This guide can be used to evaluate a training course outline and syllabus to determine when its content includes the topics necessary for training individuals to be proficient and competent remote pilot personnel. Likewise, this guide may be used to evaluate an existing training program to see when it meets the requirements in this guide. 1.5 A person meeting the requirements of this guide does not necessarily possess adequate knowledge, experience, and training to make specific mission-critical decisions safely. This guide merely describes recommended topics and does not prov