This book offers a comprehensive and in-depth exploration of various forms of maritime communications, delving into the latest advancements in marine technologies. The book addresses the existing maritime communication systems, which encompass terrestrial, aerial, and satellite networks. However, it goes beyond mere description, providing a holistic perspective on how these systems work together to ensure seamless and uninterrupted communication at sea. Readers will gain insights into the challenges faced by maritime communication and explore innovative solutions that have emerged to overcome these obstacles. One of the book's key focuses is on the application of modern wireless telecommunication systems and related services in the maritime context. The contributors analyze different scenarios where these technologies can be leveraged effectively to enhance crew communication and support various onboard tasks. With the remarkable advancements in wireless telecommunications, mobile/wireless computing, pervasive computing, and location-based services, the integration of these technologies into maritime settings becomes increasingly feasible and beneficial.