Jumat, 20 Desember 2013

Kinds of Vessel

1.1 Stern trawlers (with slipways) including oceangoing shell dredgers.
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Look for trawling gear deployed and retrieved from the stern.


Photos of Inshore trawlers including small shrimpers and Danish/Scottish seiners should be uploaded to subcategory 5 below.
Larger stern trawlers often have a ramp, though pelagic and small stern trawlers are often designed without a ramp. Stern trawlers are designed to operate in most weather conditions. They can work alone when midwater or bottom trawling, or two can work together as pair trawlers.
Bear in mind that there is a separate category for thoroughbred pelagic trawlers without slipways in subcategory # 3


1.2 Beam trawlers / dredgers.
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Look for sturdy outrigger booms for towing a beam trawl, one warp on each side.

Photos of Inshore trawlers including small shrimpers and Danish/Scottish seiners should be uploaded to subcategory 5 below
Double-rig beam trawlers can tow a separate trawl on each side. Beam trawling is used in the flatfish and shrimp fisheries in the North Sea. They are medium sized and high powered vessels, towing gear at speeds up to 8 knots. 


1.3 Purse seiners (including pelagic trawlers without slipways and industrial trawlers).
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Look for booms or a slewing deck crane which hauls the seine net.
Other indicators are Net guides, net layers triplex haulers and fish pumps.

Photos of Inshore trawlers including small shrimpers and Danish/Scottish seiners should be uploaded to subcategory 5 below
Seiners circle a shoal with a deep curtain of netting, using bow thrusters for better maneuverability. Then the bottom of the net is pursed (closed) underneath the fish shoal by hauling a wire running from the vessel through rings along the bottom of the net and then back to the vessel
European seiners - have their bridge and accommodation located more to the after part of the vessel with the working deck amidships.
American seiners - have their bridge and accommodation placed forward with the working deck aft.
Drum seiners - have the same layout as American seiners except a drum is mounted on the stern.
Tuna purse seiners - are large purse seiners, normally over 45 meters, equipped to handle large and heavy purse seines for tuna. They have the same general arrangement as the American seiner, with the bridge and accommodation placed forward. A crows nest or tuna tower is positioned at the top of the mast, outfitted with the control and maneuver devices. A very heavy boom which carries the power block is fitted at the mast. 


1.4 Netters, longliners, trollers ocean going (MORE THAN 70 feet / 21m)
Seine netters. Look for nets and winches.

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There are three basic types.
Anchor seiners Have the wheelhouse and accommodation aft and the working deck amidships, thus resembling side trawlers. The seine net is stored and shot from the stern, and they may carry a power block. Anchor seiners have the coiler and winch mounted transversally amidships.
Scottish seiners Basically configured the same as anchor seiners.
The only difference is that, whereas the Anchor seiner has the coiler and winch mounted transversely amidships, the Scottish seiner has them mounted transversely in the forward part of the vessel and uses engine power for remaining stationary while heaving instead of an anchor.
Asian seiners In Asia the seine netter usually has the wheelhouse forward and the working deck aft, in the manner of a stern trawler. However, in regions where the fishing effort is a labour intensive, low technology approach, they are often undecked and may be powered by outboards motors, or even by sail.
Longliners

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These use one or more long heavy fishing lines with a series of hundreds or even thousands of baited hooks hanging from the main line by means of branch lines called snoods.
Hand operated longlining can be operated from boats of any size. The number of hooks and lines handled depends on the size of vessel, the number of crew, and the level of mechanization. Large purpose built longliners can be designed for single species fisheries such as tuna.
On such larger vessels the bridge is usually placed aft, and the gear is hauled from the bow or from the side with mechanical or hydraulic line haulers. The lines are set over the stern.
Trollers
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Look for two or four trolling booms raised and lowered by topping lifts, held in position by adjustable stays.

Example above under + Line vessels in Research Resource listed above http://www.fao.org/fishery/vesseltype/search/en
These catch fish by towing astern one of more trolling lines. A trolling line is a fishing line with natural or artificial baited hooks trailed near the surface or at a certain depth. Several lines can be towed at the same time using outriggers to keep the lines apart. Purpose built trollers are usually equipped with two or four trolling booms raised and lowered by topping lifts, held in position by adjustable stays. 


5. Fishing vessels with LOA LESS THAN 70 feet / 21m
This includes Netters, longliners, jiggers, inshore trawlers, trollers, trawlers, Seiners 


6. Crab / Lobster / Pot boats
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Look for pots/traps stored on deck

These are used to set pots or traps for catching fish, crabs, lobsters, crayfish and other similar species.
Trap setters range in size from open boats operating inshore to larger decked vessels, 20 to 50 meters long, operating out to the edge of a continental shelf.
Small decked trap setters have the wheelhouse either forward or aft with the fish hold amidships. They use hydraulic or mechanical pot haulers.
Larger vessels have the wheelhouse forward, and are equipped with derricks, davits or cranes for hauling pots aboard. 


7. Whalers & Sealers
Whalers. Look for Harpoon gun mounted on the bow and/or ramps/slipway at stern, and black painted band around crows nest

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These are specialized ships designed for the catching and/or processing of whales. At first, whale catchers either brought the whales they killed to a whaling station or factory ship anchored in a sheltered bay or inlet. Later, with the development of the stern slipway, whale catchers brought their catch to factory ships operating in the open sea.
Sealers. Look for crows nest without black band.

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Sealers are vessels in various sizes which act as a base from which the hunt for seals are conducted. They are in most cases sturdy vessels that can operate in ice conditions. Many of these vessels also has a crows nest. In Norwegian waters a sealer can be distinguished from a whaler by the absence of a black band around the crows nest. 


8. OVERVIEW – FISHING FLEETS (can be any number of vessels)
Photos including more than one fishing vessel.
If all the vessels in the photo are not fishing vessels, upload to the Shipping category 


9. REEFERS IN SUPPORT OF FISHING VESSELS AT SEA
Look for ship in the process of transhipment, large black fenders stowed on deck, or alongside

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A reefer ship is used to transport perishable commodities which require temperature controlled transportation. Side door vessels have water tight ports on the ships hull, which open into a cargo hold. Conventional vessels have a traditional cargo operation with top opening hatches and cranes/derricks. This category is to contain only the reefers which participate in the above mentioned operations (at the time of picture). 


10. Live fish carriers
Look for Fish tanks, fish pumping equipment.

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A vessel for the carriage of live fish in water tanks 


11. Fisheries Research Vessels and Fishing Support Vessels
Fisheries management draws on fisheries science in order to find ways to protect fishery resources so sustainable exploitation is possible. Modern fisheries management is often referred to as a governmental system of appropriate management rules based on defined objectives and a mix of management means to implement the rules, which are put in place by a system of monitoring control and surveillance.
The political goal of resource use is often a weak part of the system of fisheries management, as objectives can conflict
Use Research Source data. Mention that source in the Description
Fishery Research Vessel.
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A vessel for research into fish stocks and conservation.
The vessel may catch fish for scientific purposes, such as research into marine life and the ecosystem on the bottom in the sea etc.
Fishery Support Vessel.
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A vessel for supporting fishing activities 

 

 

 

Resource : www.shipspotting.com

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