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Wreck Diving
Wreck diving is recreational diving where the wreckage of ships, aircraft and other artificial structures are explored. The term is used mainly by recreational and technical divers. Professional divers, when diving on a shipwreck, generally refer to the specific task, such as salvage work, accident investigation or archaeological survey. Although most wreck dive sites are at shipwrecks, there is an increasing trend to scuttle retired ships to create artificial reef sites. Diving to crashed aircraft can also be considered wreck diving. The recreation of wreck diving makes no distinction as to how the vessel ended up on the bottom. Some wreck diving involves penetration of the wreckage, making a direct ascent to the surface impossible for a part of the dive. Environment The environment of wreck diving is sunken shipwrecks and other vehicles and structures, either sunk by misfortune, acts of war, or intentionally, as targets in military exercises, to serve as artificial reefs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diver At Hilma Hooker Wreck
Diver or divers may refer to: *Diving (sport), the sport of performing acrobatics while jumping or falling into water *Practitioner of underwater diving, including: **scuba diving, **freediving, **surface-supplied diving, **saturation diving, and ** atmospheric suit diving People * Diver (surname) *Edward Divers (1837–1912), British chemist *"Diver", nickname of Tom Derrick (1914–1945), Australian Second World War recipient of the Victoria Cross Military *V-1 flying bomb, code named "diver" by the British World War II armed forces **Operation Diver, the British countermeasures against the German V-1 flying bomb campaign * AUM-N-4 Diver, a proposed U.S. Navy torpedo-carrying missile of the late 1940s. * Diver (United States Navy) Arts and entertainment * ''Diver'' (EP), a 2006 EP by A Wilhelm Scream * "Diver" (Nico Touches the Walls song), a 2011 song by Nico Touches the Walls * "Diver" (Kana-Boon song), a 2015 song by Kana-Boon * ''Divers'' (album), a 2015 album by Joann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treasure Hunting
Treasure hunting is the physical search for treasure. One of the most popular types of modern day treasure hunters are historic shipwreck salvors. These underwater treasure salvors try to find sunken Shipwreck, shipwrecks and retrieve artifacts with both commercial and archaeological value. In many instances, discovery of a wreck only occurs after searching tens of thousands of square nautical miles, thus making discovery normally impossible for archaeologists. Since the popularization of Metal detector, metal detectors in the 1970s, treasure hunting has also taken the form of beach combing for lost valuables. Beach hunters may search for modern jewelry, pocket change, or shipwreck treasure. Most metal detectors will fall in the $150–$600 price range, but can even cost upwards of several thousand dollars. Metal detecting is generally quite tedious and most enthusiasts go years without finding an actually valuable object. Metal detectors are quite useful to Archaeology, archaeol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frog Kick
Finning techniques are the skills and methods used by swimmers and underwater divers to propel themselves through the water and to maneuver when wearing swimfins. There are several styles used for propulsion, some of which are more suited to particular swimfin configurations. There are also techniques for positional maneuvering, such as rotation on the spot, which may not involve significant locational change. Use of the most appropriate finning style for the circumstances can increase propulsive efficiency, reduce fatigue, improve precision of maneuvering and control of the diver's position in the water, and thereby increase the task effectiveness of the diver and reduce the impact on the environment. Propulsion through water requires much more work than through air due to higher density and viscosity. Diving equipment which is bulky usually increases drag, and reduction of drag can significantly reduce the effort of finning. This can be done to some extent by streamlining divin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rule Of Thirds (diving)
In scuba diving, the rule of thirds is a rule of thumb used by divers to plan dives so they have enough breathing gas remaining in their diving cylinder at the end of the dive to be able to complete the dive safely. This rule generally only applies to diving in overhead environments, such as caves, wrecks, and ice diving, where a direct ascent to the surface is impossible and the divers must return the way they came. For divers following the rule, one third of the gas supply is planned for the outward journey, one third is for the return journey and one third is a safety reserve. However, when diving with a buddy with a higher breathing rate or a different volume of gas, it may be necessary to set one third of the buddy's gas supply as the remaining 'third'. This means that the turn point to exit is earlier, or that the diver with the lower breathing rate carries a larger volume of gas than they alone require. Reserves are needed at the end of dives in case the diver has gone dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Breathing Gas
A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas, but other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats. Oxygen is the essential component for any breathing gas. Breathing gases for hyperbaric use have been developed to improve on the performance of ordinary air by reducing the risk of decompression sickness, reducing the duration of decompression, reducing nitrogen narcosis or reducing work of breathing and allowing safer deep diving. Description A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other mixtures of gases, or pure oxygen, are also used in breathing equipment and enclosed habitats such as scuba equipment, surface supplied diving equipment, recompression chambers, high-altitude mountaineering, high-flying aircraf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deep Diving
Deep diving is underwater diving to a depth beyond the normal range accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is associated with a level of certification or training, and it may vary depending on whether the diving is recreational, technical or commercial. Nitrogen narcosis becomes a hazard below and hypoxic breathing gas is required below to lessen the risk of oxygen toxicity. At much greater depths, breathing gases become supercritical fluids, making diving with conventional equipment effectively impossible regardless of the physiological effects on the human body. Air, for example, becomes a supercritical fluid below about . For some recreational diving agencies, "Deep diving", or "Deep diver" may be a certification awarded to divers that have been trained to dive to a specified depth range, generally deeper than . However, the Professional Association of Diving Instructors (PADI) define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Technical Diving
Technical diving (also referred to as tec diving or tech diving) is scuba diving that exceeds the List of diver certification organizations, agency-specified limits of recreational diving for non-Professional diver, professional purposes. Technical diving may expose the diver to hazards beyond those normally associated with recreational diving, and to a greater risk of serious injury or death. Risk may be reduced by using suitable equipment and procedures, which require appropriate knowledge and skills. The required knowledge and skills are preferably developed through specialised training, adequate practice, and experience. The equipment involves breathing gases other than air or standard nitrox mixtures, and multiple gas sources. Most technical diving is done within the limits of training and previous experience, but by its nature, technical diving includes diving which pushes the boundaries of recognised safe practice, and new equipment and procedures are developed and honed by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silt Out
A silt out or silt-out is a situation when underwater visibility is rapidly reduced to functional zero by disturbing fine particulate deposits on the bottom or other solid surfaces. This can happen in scuba and surface supplied diving, or in ROV and submersible operations, and is a more serious hazard for scuba diving in penetration situations where the route to the surface may be obscured. Causes The most common cause in scuba diving is when a divers' fins are used too forcefully or in the wrong direction; disturbing silt, particularly in caves, wrecks or in still fresh water environments. Specific non-silting underwater propulsion techniques are taught as standard on cave diving and technical-level wreck diving penetration courses; such as the Frog Kick, Modified Flutter Kick, Helicopter Turn, Pull-and-Glide, Finger Walking and the Back / Reverse Kick. Another common cause when wreck diving is from exhaled bubbles from open circuit scuba disturbing overhead surfaces a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishing Line
A fishing line is any flexible, high-tensile cord used in angling to tether and pull in fish, in conjunction with at least one hook. Fishing lines are usually pulled by and stored in a reel, but can also be retrieved by hand, with a fixed attachment to the end of a rod, or via a motorized trolling outrigger. Fishing lines generally resemble a long, ultra-thin rope, with important attributes including length, thickness, material and build. Other factors relevant to certain fishing practice include breaking strength, knot strength, UV resistance, castability, limpness, stretch, memory, abrasion resistance and visibility. Traditional fishing lines are made of silk, while most modern lines are made from synthetic polymers such as nylon, polyethylene or polyvinylidene fluoride ("fluorocarbon") and may come in monofilament or braided ( multifilament) forms. Terminology Fishing with a hook-and-line setup is called angling. Fish are caught when one is drawn by the bait/ lure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishing Net
A fishing net or fish net is a net (device), net used for fishing. Fishing nets work by serving as an improvised fish trap, and some are indeed rigged as traps (e.g. #Fyke nets, fyke nets). They are usually wide open when deployed (e.g. by casting (fishing), casting or trawling), and then close off when retrieved to engulf and trap fish and other aquatic animals that are larger than the holes/gaps of the net, as well as many unwanted bycatches due to the underwater area a net can cover. Fishing nets are usually meshes formed by knotting a relatively thin thread, and early nets were woven from grasses, vines, flaxes and other fiber crop material, while later woven cotton was used. Modern nets are usually made of artificial polyamides like nylon, although nets of organic polyamides such as wool or silk thread were common until recently and are still used. History Fishing nets have been used widely in the past, including by stone age societies. The oldest known fishing net is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gary Gentile
Gary Gentile (born 1946) is an American author and pioneering technical diver. Diving Gary Gentile is a wreck diver. It has been suggested that Gary Gentile may be the most experienced wreck diver in the world. He has dived on the wreck of the ''SS Andrea Doria'' (sometimes referred to as the "Mount Everest" of SCUBA diving) over 190 times, and was the first diver to penetrate the first class dining room of the vessel. He was also part of the team of divers, along with Bill Nagle, who recovered the ship's bell in 1985. During the early 1990s, Gentile pioneered the use of mixed gases in wreck diving. He has also participated in expeditions to the '' SMS Ostfriesland'' at a depth of , which would serve as the impetus for greater exploration of deep-water shipwrecks, and the ''RMS Lusitania'' at a depth of . He achieved fame within the diving community with his publication of ''The Advanced Wreck Diving Guide'' in 1988. He also published the first book on technical diving, '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
