Types of Ships(5)

Types of Ships(5)

2.Industrial ships - designed to draw out raw materials and food resources from sea. Industrial procedures may include extracting oil and mineral salts or catching and processing fish, crustacean (such as lobsters, crabs and shrimps), marine flora and fauna. We are going to focus on commercial fishing and types of ships employed in it.
a)Extractive ships - ships used solely for catching (fish, sea mammals and plants)
-fishing ships - according to the method of catching fish, several types are distinguished among which are:

Trawlers - the most widespread type of fishing vessel; The name "trawler" comes from "trawl" - a fishing net which is dragged along the sea floor. Depending on where the trawl is launched - over the side of the ship or over her stern, there are side and stern trawlers respectively. Some of the largest trawlers (factory trawlers) are equipped with machines for processing, canning and storing the fish in refrigerator compartments.

Trawler-Public domain images

Seiners - Seiners use a peculiar kind of net (a purse seine) which hangs vertically in the water and has a rope at its bottom. Once the shoal of fish enters the net, the rope tightens and closes it, just like an upside-down purse.
-Whalers - ships designed for hunting whales; Whalers usually have high forecastle which contains the harpoon weapon.
-Algae-catching vessels
-Others - these include vessels specialized in the catch of crabs, walruses, seals, sharks, etc.

b)Processing ships - Their main purpose is to receive the catch from extractive ships, process it into usable products and bring it to ports. Mother ships and refrigerator fishing vessels (with conditions to freeze fish) are common representatives of this group. The former ones are very large fishing ships with an average speed of 13-16 knots. They also supply fishing vessels with everything necessary for their prolonged stay at sea such as fuel, food and medical assistance.