TMS designed and built water injection vessels. With a big flow, water is sprayed on the seabed by these relatively small dredging vessels. This loosens the soil of the seabed. This soil is taken away by river current and tides.

These vessels are provided with own propulsion. Besides, these vessels are constructed to be transported over the road. They both consist of a portside and a starboard pontoon which are connected in the water. The most recent vessel has a crane pontoon which can be mounted in front of the two other pontoons. The crane can be equipped with a clamshell bucket or a dredge pump with cutter for dredging places which are hard to reach. Crane pontoon and vessel can anchor themselves by three spudpoles during activities.