Fishing Boats.

There are three kinds of fishing trawlers/boats, inshore, deep water and production vessels or factory ships.

Today many people are describing the fisherman as the reaper of the sea. But we are also being told by the medical world that fish is a good food for fighting many illnesses, such as coronary heart disease and diabetes, because it contains large amounts of Omega-3 oils. 

Fishing has been one of the oldest professions in the world, and for may so called third world nations it is their only source of revenue.

But admittedly the introduction of certain type of nets, factory ships has resulted in over fishing and the decline of certain breed, disease of various kinds, because of the breakdown of the food chain in the oceans.

Fishing boats are built with massive hulls below the water line to be able to deal with difficult sea conditions. The crews who work these boats do take great risks going to sea in all weathers. But basically all the vessels have similar equipment, just on different scales.