The paper describes a multimedia-broadband communication system for remote ship monitoring, diagnosis, and repair using the screen-sharing facility of workstations and a satellite communication link. It is supposed that on the board a workstation is placed with the capability of sensor data collection from each workstation at shipyard, head office of the shipping company, spare parts stock, spare parts supplier, ship classification society etc.For implementation of screen-sharing feature the X-WINDOW technique has been used, embedded into INTERACTIVE UNIX as operating system, and for implementation of communication functions the Ethernet oriented TCP/IP protocol, that enables, via an IP/X.25 router, to transfer the data over any package-switching communication facility.Integrated into the X-WINDOW system is also a knowledge-based diagnostic system for ship engine, implemented in a hybrid combination of Turbo-PROLOG and C, in which the process of engine diagnosis can be triggered on on-board crew demand, or by an alarm signal within the engine. The system pilot installation has been developed within the MARIN ABC Project of RACE Program of EEC and should be used, along with other video/voice communication and tele-conferencing facilities, for increase the safety and efficiency of ship operation as well as for logistic support and improvement of overall system operation.