Introduction to the Fifth ENRI International Workshop on ATM/CNS (EIWAC2019) -- Volatility in Air Traffic Management - How changes in traffic patterns affect efficiency in service provision -- Coordinated Sequencing of Traffic on Multiple En-route Constraint Points -- Macroscopic Analysis to Identify Stage Boundaries in Multi-Stage Arrival Management -- Analysis of Weather Impact on Flight Efficiency for Stockholm Arlanda Airport Arrivals -- AcListant with Continuous Learning: Speech Recognition in Air Traffic Control -- A Data-driven Approach for Taxi-time Prediction: A Case Study of Singapore Changi Airport -- Dealing with Adverse Weather Conditions by Enhanced Collaborative Decision Making in a TAM APOC -- Precision Approach Procedures with General Aviation aircraft and Helicopter at Braunschweig Research Airport -- An Optimistic Planning Approach for the Aircraft Landing Problem -- Passengers on social media: A real-time estimator of the state of the US air transportation system -- A Human-in-the-Loop Simulation Study on the Requirements of Air Traffic Control Operations for expanding Continuous Descent Operations -- On the use of Generative Adversarial Networks for Aircraft Trajectory Generation and Atypical Approach Detection -- RRT* Based Algorithm for Trajectory Planning considering Probabilistic Weather Forecasts -- Impact of wind on the predictability and uncertainty management of 4D-trajectories -- Towards Automatic Trajectory Modification for Reducing Air Traffic Complexity Using an ATC Difficulty Index -- Air/Ground SWIM Integration to Achieve Information Collaborative Environment -- A Simple Note on Shadowing Effects and Multipath Propagation for CNS -- ADS-B Coverage Design in Mountainous Terrain -- Nearfield Inspection of Navigation Systems with UAVs - First Results from the NAVANT Project. .

This book provides novel concepts and techniques for air traffic management (ATM) and communications, navigation, and surveillance (CNS) systems. The book consists of selected papers from the 6th ENRI International Workshop on ATM/CNS (EIWAC2019) held in Tokyo in October 2019, the theme of which was "Exploring Ideas for World Aviation Challenges". Included are key topics to realize safer and more efficient skies in the future, linked to the integrated conference theme consisting of long-term visions based on presentations from various fields. The book is dedicated not only to researchers, academicians, and university students, but also to engineers in the industry, air navigation service providers (ANSPs), and regulators of aviation.