The introductory part of the paper discusses the development of tugboats since the 19th century, with an emphasis on technological progress in propulsion systems, hull construction and traction equipment. The chapter "Historical and technological features of tugboats" provides an overview of the historical development of tugboats, starting with the use of boats and the invention of steam engines that revolutionized the design of tugboats. The chronological revolution is traced from the early versions of steam-powered tug boats to modern tug boats powered by diesel engines. In the chapter "Construction and maneuvering characteristics of harbor tugs", the construction features of harbor tugs are discussed, with an emphasis on auxiliary systems such as fenders, towing hooks, towing lines and winches. Tugs are also defined according to the types of drives, such as conventional tugs and ASD tugs with stern propulsion and tractor tugs with cycloidal or azimuth propulsion located towards the bow. The paper explains the methods used in tugboat operations, including direct and indirect towing, and combined push and pull. The interaction of tugboats with ships during the docking and departure operation, as well as the positioning and escorting of ships, is also investigated. The paper also charts traction force and analyzes the safety aspects of tugboat operations.