Grab cranes can dredge material from a stationary pontoon and deposit it in independently operated barges.
Grab cranes are able to handle both sludge and objects (stone blocks, wrecks). They are suitable for clearing material from waters which are difficult to access, such as city canals. They can also be used for gravel mining and maintenance dredging on uneven beds. Boskalis has around 18 floating grab cranes.
