Book excerpt: Get re-certified as a U.S. commercial drone pilot quickly and easily. This comprehensive FAA Part 107 test prep and study guide for the Unmanned General Recurrent (UGR) exam enables you to get re-certified as a commercial drone pilot and will save you time money and hassle in the re-certification process. This study guide contains the most relevant and important items you need to know to pass the URG exam. In addition to the study guide, a practice UGR exam is also included in this book.