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A wooden halibut hook is a type of fish hook, historically used by the indigenous peoples of the Pacific Northwest Coast to catch Pacific halibut. In addition to their utilitarian function, wooden halibut hooks have artistic value, and spiritual significance to the cultures that traditionally used them.
To get the bait down to the halibut, it is usually fished on a wire spreader or a sliding-sinker rig with sinker size 4 oz (113 g) to 4 lb (1.81 kg), depending on such factors as depth and current. [3] Halibut, along with salmon, provide sustenance for several Pacific Coast native groups.
Deepsea Delta semi-submersible drilling rig in the North Sea Comparison of deepwater semi-submersible (left) and drillship (right). A semi-submersible platform is a specialised marine vessel used in offshore roles including as offshore drilling rigs, safety vessels, oil production platforms, and heavy lift cranes.
A jackup rig or a self-elevating unit is a type of mobile platform that consists of a buoyant hull fitted with a number of movable legs, capable of raising its hull over the surface of the sea. The buoyant hull enables transportation of the unit and all attached machinery to a desired location.
In the late 1960s, factory ships from other countries started fishing haddock, herring, salmon, and halibut on traditional U.S. fishing grounds. [5] Technological advances have played an important role in the development of U.S. fisheries. Increases in size and speed allowed vessels to fish in more distant waters.
Psettodes erumei, commonly known as the Indian halibut or adalah, is a species of flounder found in the Indian and Pacific Oceans, from the Red Sea to northern Australia. Like other members of its family, it is regarded as one of the most primitive flatfish, having a thicker, less compressed body and a migrated eye that is at the edge of the ...
The rig is able to operate at the water depth up to 11,811 feet (3,600 m), which is classified by the oil industry as "ultra-deepwater", and its drilling depth is 15,200 metres (49,900 ft). [ 6 ] [ 7 ] [ 8 ] The water depth still suitable for its operations is twice as much as for Deepwater Horizon . [ 9 ]
A balestron rig is a sailplan involving a boom that extends forwards of the mast and is pivoted on it. It is a balanced rig. [1] It involves a mainsail and a smaller jib on an unstayed mast. [2] Mainsail and jib are controlled by a single sheet. The rig was extensively used on model boats but has recently been used of full-sized vessels. [3]
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