Book excerpt: Aviation English investigates the key issues related to the use of English for the purpose of communication in aviation and analyses the current research on language training, testing and assessment in the area of Aviation English. Based on a series of recent empirical studies in aviation communication and taking an interdisciplinary approach, this book: provides a description of Aviation English from a linguistic perspective lays the foundation for increased focus in the area of Aviation English and its assessment in the form of English Language Proficiency (ELP) tests critically assesses recent empirical research in the domain. This book makes an important contribution to the development of the field of Aviation English and will be of interest to researchers in the areas of applied linguistics, TESOL and English for Specific Purposes.