Band 6+: The diagram below shows how a dredger can remove mud from the bottom of canals. The table compares features of the canal dredger with those of a coastal dredger. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The picture illustrates how a dredging system to eliminate the waste below the canal/lagoon, or even the North Sea as a new technology plan in Venice. Meanwhile, the table gives information about the comparison between a canal and a coastal dredger’s specifications.

To begin with, a larger boat fitted with hydraulic arms to lower the centrifugal pump until it reaches canal beds. It deploys a suction pump and rotating blades, which have function to push the slurry in. Then the mud is carried out through a large tube to reach a shuttle vessel. Once it goes to the shuttle boat, it will be towed out of city for dumping.

According to the table, the coastal dredger surpassed the size an capacity of canal dredger. The coastal dredger is 85 meters in hull length, which almost four times longer than canal, at 22 meters. Furthermore, canal can only be operated up to 1.87 meters, while the coastal services up to 35 mdters depth. To be more specific, the coastal is operated in North Sea, and the can can only be operated in canal/lagoon.