This book details the technical features and navigational applications of shipborne radio navigation instruments used in maritime transportation. The fifth edition expands the coverage of radio navigation systems, providing a more detailed explanation of satellite radio navigation stations and describing several types of their receiver indicators. The theoretical content on radar stations has been streamlined and simplified, with outdated radar systems removed and replaced by new types. The descriptions of shipborne radio navigation devices are presented using simplified functional diagrams. The operation of these instruments is explained in sufficient detail, along with a concise overview of their navigational use. Additionally, the book offers a broader discussion of the current state and future prospects of radio navigation equipment. Intended for students training for maritime navigation careers at seafarer schools, it can also be a useful resource for students specializing in radio engineering.