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Speargun
A speargun is a ranged underwater fishing device designed to launch a tethered spear or harpoon to impale fish or other marine animals and targets. Spearguns are used in sport fishing and underwater target shooting. The two basic types are ''pneumatic'' and ''elastic'' (powered by rubber bands). Spear types come in a number of varieties including threaded, break-away and lined. Floats and buoys are common accessories when targeting larger fish. Components The basic components of a speargun are a spear, a stock or barrel, and a handle or grip containing a trigger mechanism. Spearguns are usually from long, round or roughly rectangular from in diameter/width. Types of spearguns Spearguns are, most often, divided according to propulsion method, with the two common variants being rubber (or band) powered, and air powered (pneumatic). Band-powered spearguns, which are the simplest and cheapest to maintain, with rubber being the predominant material, come in two types: those ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spearfishing
Spearfishing is fishing using handheld elongated, sharp-pointed tools such as a spear, gig, or harpoon, to impale the fish in the body. It was one of the earliest fishing techniques used by mankind, and has been deployed in artisanal fishing throughout the world for millennia. Early civilizations were familiar with the custom of spearing fish from rivers and streams using sharpened sticks. Modern spearfishing usually involves the use of underwater swimming gear and slingshot-like elastic spearguns or compressed gas powered pneumatic spearguns, which launch a tethered dart-like projectile to strike the target fish. Specialised techniques and equipment have been developed for various types of aquatic environments and target fish. Spearfishing uses no bait and is highly selective, with no by-catch, but inflicts lethal injury to the fish and thus precludes catch and release. Spearfishing may be done using free-diving, snorkelling, or scuba diving techniques, but spearfish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpoon
A harpoon is a long, spear-like projectile used in fishing, whaling, sealing, and other hunting to shoot, kill, and capture large fish or marine mammals such as seals, sea cows, and whales. It impales the target and secures it with barb or toggling claws, allowing the fishermen or hunters to use an attached rope or chain to pull and retrieve the animal. A harpoon can also be used as a ranged weapon against other watercraft in naval warfare. Certain harpoons are made with different builds to perform better with the type of target. For example, the Inuit have short, fixed-foreshaft harpoons for hunting at breathing holes, while loose-shafted ones are made for throwing and remaining attached to the game. History In the 1990s, harpoon points, known as the Semliki harpoons or the Katanda harpoons, were found in the Katanda region in Zaire. As the earliest known harpoons, these weapons were made and used 90,000 years ago, most likely to spear catfishes. Later, in Japan, sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spear
A spear is a polearm consisting of a shaft, usually of wood, with a pointed head. The head may be simply the sharpened end of the shaft itself, as is the case with Fire hardening, fire hardened spears, or it may be made of a more durable material fastened to the shaft, such as bone, flint, obsidian, copper, bronze, iron, or steel. The most common design for hunting and/or warfare, since modern times has incorporated a metal spearhead shaped like a triangle, lozenge (shape), diamond, or Glossary of leaf morphology, leaf. The heads of fishing spears usually feature multiple sharp Tine (structural), points, with or without barbs. Spears can be divided into two broad categories: those designed for thrusting as a melee weapon (including weapons such as lances and Pike (weapon), pikes) and those designed for throwing as a ranged weapon (usually referred to as javelins). The spear has been used throughout human history as a weapon for hunting and/or fishing and for warfare. Along with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Firearm
An underwater firearm is a firearm designed for use underwater. Underwater firearms or needleguns usually fire flechettes or spear-like bolts instead of standard bullets. These may be fired by pressurised gas. History Underwater firearms were first developed in the 1960s during the Cold War as a way to arm combat divers. Design Because standard bullet ammunition does not work well underwater, underwater firearms commonly fire flechettes instead of standard bullets. The barrels of underwater pistols are typically not rifled. Rather, the fired projectile maintains its ballistic trajectory underwater by hydrodynamic effects. The lack of rifling renders these weapons relatively inaccurate when fired out of water. Underwater rifles are more powerful than underwater pistols and more accurate out of water, but underwater pistols can be manipulated more easily underwater. Among the many engineering challenges in designing underwater firearms is that of developing a weapon whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharpe Family Murders
The Sharpe family murders refer to an Australian 2004 double murder. Australian man John Myles Sharpe killed his pregnant wife, New Zealander Anna Marie Kemp, and their 20-month-old daughter, Gracie Louise Kemp, in the semi-rural Melbourne suburb of Mornington, in March 2004. Authorities say Sharpe repeatedly fired a speargun into the heads of his victims, later exhumed the body of his wife from a shallow grave, dismembered her, then disposed of her body in a landfill. Sharpe later appeared in emotional interviews on television seeking information on his family's whereabouts. He eventually confessed to the murders and was sentenced in 2005 to two consecutive terms of life imprisonment, with a non-parole period of thirty-three years. He will be eligible for parole in 2037. Background John Sharpe was born 28 February 1967 in Mornington, Victoria, where he also grew up. He met his New Zealand-born wife, Anna Kemp, when they worked together at the Commonwealth Bank. They marri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overview Of Gun Laws By Nation
Gun laws and policies, collectively referred to as firearms regulation or gun control, regulate the manufacture, sale, transfer, possession, modification, and use of small arms by civilians. Laws of some countries may afford civilians a right to keep and bear arms, and have more Liberalization, liberal gun laws than neighboring jurisdictions. Gun control typically restricts access to certain categories of firearms and limits the categories of persons who may be granted firearms license, permission to access firearms. There may be separate licenses for hunting, Shooting sport, sport shooting, self-defense, collecting, and concealed carry, each with different sets of requirements, privileges, and responsibilities. Gun laws are usually justified by a legislature's intent to curb the usage of small arms in crime, and to this end they frequently target types of arms identified in crimes and shootings, such as handguns and other types of concealable firearms. Semi-automatic rifle desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishing Equipment
Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment (freshwater or marine), but may also be caught from stocked bodies of water such as ponds, canals, park wetlands and reservoirs. Fishing techniques include trawling, longlining, jigging, hand-gathering, spearing, netting, angling, shooting and trapping, as well as more destructive and often illegal techniques such as electrocution, blasting and poisoning. The term fishing broadly includes catching aquatic animals other than fish, such as crustaceans ( shrimp/lobsters/crabs), shellfish, cephalopods ( octopus/squid) and echinoderms (starfish/sea urchins). The term is not normally applied to harvesting fish raised in controlled cultivations (fish farming). Nor is it normally applied to hunting aquatic mammals, where terms like whaling and sealing are used instead. Fishing has been an important part of human culture since hunter-gatherer times. It is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polespear
A polespear (hand spear or gidgee) is an underwater tool used in spearfishing, consisting of a pole, a spear tip, and a rubber loop. Polespears are often mistakenly called Hawaiian slings, but the tools differ. A Hawaiian sling is akin to a slingshot or an underwater bow and arrow, since the spear and the propelling device are separate, while a polespear has the sling (rubber loop) attached to the spear. Description The pole is usually between four feet and ten feet long and made of fiberglass, carbon fibre, aluminum, graphite, or wood. Longer versions often break down into two or more pieces that screw together. The tip is either threaded to accept different kinds of spear tips or already has a fixed tip attached. The most popular spear tip on polespears are the paralyzer (often called a three-prong), and the Tahitian shaft (a single pivoting barb). Some more serious hunters will equip the polespear with a slip-tip (tip removes from the end and tethers to a fixed point). At th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hawaiian Sling
The Hawaiian sling is a device used in spearfishing. The sling operates much like a bow and arrow does on land, but energy is stored in rubber tubing rather than a wooden or fiberglass bow. Description Mechanically, the device is simple: the only moving parts are the spear shaft and the rubber tubing. A loop of tubing is attached to a block of material, often wood, with a hole drilled in it which is slightly larger in diameter than the shaft. The shaft is placed in the hole, notched in the loop and pulled back, tensioning the tubing. When the shaft is released, the tubing propels it forward, faster and further than a diver could by hand. The Hawaiian sling has some similarities to spearguns and polespears, in that all are powered by energy stored in rubber tubing. However, it occupies a middle ground between the two; the sling is somewhat more powerful than a polespear and offers a much more comfortable grip, but is less powerful than most spear guns. Like a pole spear, the di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scuba Diving
Scuba diving is a Diving mode, mode of underwater diving whereby divers use Scuba set, breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. The word ''scuba'' is an Acronym#Normal case and acronyms, acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent submitted in 1952. Scuba divers carry their own source of breathing gas, affording them greater independence and movement than surface-supplied divers, and more time underwater than freedivers. Although the use of compressed air is common, other gas blends are also used. Open-circuit scuba systems discharge the breathing gas into the environment as it is exhaled and consist of one or more diving cylinders containing breathing gas at high pressure which is supplied to the diver at ambient pressure through a diving regulator. They may include additional cylinders for range extension, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
