TowWorks is a "software as a service" marine operations system with modules for fleeting, towing, tankering, dock, terminal, harbor, ship assist and affreightment operations that tie seamlessly into all major accounting systems using a modern database. Our graphic user interface allows drag and drop tow building, fleeting and docking of barges while automatically making entries into the vessel log, allowing the wheelman to concentrate on the tow and crew instead of paperwork. The Voyage Planner completely automates the route planning and information gathering (bridges, locks, weather, LNMs, river gauges, etc.) part of the process. The Maintenance and Compliance modules allow complete cradle to grave tracking and closeout of maintenance and compliance issues. Due to the nature of our integrated modules TowWorks can be easily configured for any marine industry business model. From a small fleet operation with a single boat to operations with multiple fleeting areas that handle affreightment and towing; TowWorks can be configured with minimal custom changes required using only the modules needed.