In this work the development of a specialized computerized system for remote diagnostics of level sensors of floating dock ballast system is presented. Ballast system of floating dock and requirements for reliable measurement of liquid levels in ballast tanks are described in detail. The hierarchical functional structure of the proposed remote diagnostics system consists of a multiprocessor computing complex with the corresponding software and the branched structure of digital devices. The

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... rs propose the method of checking the correctness of level sensors that generally increases system reliability. The diagnostics calculations of the measurements correctness of the level sensors are performed on the basis of programmable logic device (PLD) with the Field-Programmable Gate Array (FPGA) architecture. The collection of diagnostics information from PLD is processed by a single-board computer that transmits data via the Internet to the cloud service "ThingSpeak". The overall results of work of the remote diagnostics system for level sensors are displayed graphically in real time on any, specialized for these tasks, computer or mobile device that has Internet access.