Performance-based Navigation (PBN) is a navigation concept that allows aircraft to navigate along an accurate and predictable flight path using satellite-based technology and onboard avionics. PBN includes two navigation specifications: Required Navigation Performance (RNP) and Area Navigation (RNAV). The PBN concept allows aircraft to fly more precise routes and approaches, which reduces fuel consumption, emissions, and noise. It also enhances safety by reducing the risk of mid-air collisions and allows for more efficient use of airspace. The PBN manual is a guidebook that provides guidance on implementing PBN in accordance with International Civil Aviation Organization (ICAO) standards and recommended practices. It covers topics such as PBN fundamentals, PBN navigation specifications, PBN operational approval, PBN training, and PBN implementation. The manual is designed for use by aviation authorities, air navigation service providers, airlines, and pilots. It provides detailed information on the technical and operational aspects of PBN, including how to design, implement, and maintain PBN procedures and how to train pilots and air traffic controllers to use PBN. It also includes case studies and examples to illustrate best practices and lessons learned from PBN implementation around the world.