The term 'Trawler' is used to describe a type of BOAT and a type of fishing technique. A trawler is a BOAT that is designed for fishing with a net, and the technique of trawling involves dragging a net through the water to catch fish. The term 'trawler' can also refer to a specific type of BOAT, which is usually larger than other fishing boats and has a wide beam and a deep hull. The term 'dragger' is another name for trawling, which is the process of dragging a net through the water to catch fish.