Although trailing suction hopper dredgers and cutter suction dredgers are the core of a dredging fleet, they do not suffice for executing dredging works. Dredging works require a small fleet of floating auxiliary equipment such as tugboats, workboats, crew vessels, survey vessels, pontoons, etc.
The importance of these auxiliary vessels should not be underestimated. In some cases the anchors of a cutter suction dredgers must be placed by means of a workboat. A floating pipeline must be anchored using anchors and pontoons. Otherwise, waves and currents could damage and even break the pipeline. Crew members, spare parts, fuel and lubricants must be brought aboard the dredger, which is working continuously.