An efficient and powerful data handling serves as a basis for monitoring and analysing dredging operations especially when it comes to large-scale projects where a greater number of dredgers are involved. For this reason, the HMT-System comprises an highly productive database for dredging data, with which various and numerous dredging equipment can be handled simultaneously. In the course of the JWP Project, up to 14 dredgers were monitored in parallel. The most important input data were obtained onboard the dredges through automatic and continuous data acquisition. Additional information, generated and transmitted in various ways (e.g. daily reports), was also added to the database.