1) Barge 2) Canal maker 3) Canal-digging device 4) Flatboat 5) Lighter 6) Shaker for condiments 7) Silt-removing boat 
• (n.) One who fishes with a dredge. • (n.) A dredging machine. • (n.) A box with holes in its lid; -- used for sprinkling flour, as on meat or a breadboard; -- called also dredging box, drudger, and drudging box.
(from the article `commercial fishing`) These vessels tend to fish in sheltered and shallow waters for certain types of shellfish. They are similar to beam trawlers, but they may have four ...
Dredg'er noun 1. One who fishes with a dredge. 2. A dredging machine. 
A dredger is a ship used for picking up rubbish from waterways and removing materials from beneath the surface of the water.
[n] - a barge or barge-like vessel used for dredging
noun a barge (or a vessel resembling a barge) that is used for dredging
dredge (def. 1). · a person who uses a dredge.