It is important for every DP professional to understand the system well that they are going operate or maintain. Keeping this in view, this book starts with an introduction to the functioning of DP system. Chapter two makes the reader aware of the six degrees of the movements. The understanding of the movements controlled by the DP system and the movements compensated for offsetting the readings of the position reference sensors is explained. Chapter three deals with the seven components of the DP system, how they connect with each other and how the controller controls the thruster output with the help of thruster allocation logic.Asking questions make the learning process more interactive. The book includes the questions and their answers which address various aspects of Bloom's taxonomy of understanding, applying and evaluating the subject. Chapter four to chapter fifteen contain the questions and answers. These chapters include questions and answers from basic functioning of the DP system, the sensor, position reference sensor, test on PRS, automation and networking used in DP system, various tests and trials conducted and importantly the operations related questions.