- Hardhat diving redirects here. Often , "hardhat diving" is used to specifically mean diving in the old-type Standard diving dress. A standard diving dress consists of a metallic ( Copper, Brass or Bronze) Diving helmet, an airline or hose from a Surface supplied
Professional Diving is a type of diving where the divers are paid for their work. Scuba diving is swimming underwater, or taking part in another activity while using a Scuba set. There are several branches of professional diving, the most well known of which is probably commercial diving. Any person wishing to become a professional diver normally requires specific training that satisfies legislation, such as that set by the United Kingdom Health and Safety Executive. Legislation (or " Statutory law " is law which has been promulgated (or " Enacted quot by a Legislature or other Governing The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located The Health and Safety Executive (HSE is a United Kingdom Non-departmental public body. Due to the dangerous nature of some professional diving disciplines, specialized equipment such as a diver to surface communication system is often required by law.
![Diver with KB Bandmask [1]](http://upload.wikimedia.org/wikipedia/en/thumb/5/5d/KB_Bandmask.jpg/300px-KB_Bandmask.jpg)
Contents |
Equipment
Diving suit
Depending on the water temperature and length of dive, the diver will either use a wetsuit, where neoprene provides thermal insulation but the diver gets wet, a hot water diving suit which is similar to a wetsuit but is flooded with warm water from the surface through an umbilical, or a drysuit, which keeps the diver totally dry and relies on either the suit material or the air trapped in thermal undergarments to insulate the diver. A diving suit is a garment or device designed to protect a diver from the Underwater environment A wetsuit is a protective garment used for watersports such as Scuba diving, Surfing, Windsurfing, Kitesurfing, and Triathlon Neoprene or polychloroprene is a family of synthetic Rubbers that are produced by Polymerization of Chloroprene. A dry suit or drysuit provides Thermal insulation or passive thermal protection to the wearer while immersed in water and is worn by divers, Certain applications require a specific type of dive suit; long dives into deep, cold water normally require a hot water suit, whilst diving into potentially contaminated environments requires a drysuit. [1]
Breathing apparatus
A number of factors dictate the type of breathing apparatus used by the diver. Typical considerations include the length of the dive, water contamination, space constraints and vehicle access for support vehicles. Some disciplines will very rarely use surface supplied diving, such as military clearance divers, whilst commercial divers will rarely use SCUBA equipment. Surface supplied diving (also known as Hooka diving refers to divers using equipment supplied with Breathing gas using an umbilical cord A scuba set is an independent breathing set that provides a scuba diver with the Breathing gas necessary to breathe underwater during Scuba diving.
Scuba
SCUBA equipment is normally used by media and military divers, often utilizing specialized equipment such as rebreathers, which are closed circuit SCUBA equipment that recycles breathing gas instead of releasing it into the water. Scuba diving is swimming underwater, or taking part in another activity while using a Scuba set. Scuba diving is swimming underwater, or taking part in another activity while using a Scuba set. A rebreather is a type of Breathing set that provides a Breathing gas containing Oxygen and recycled exhaled gas It is the "re-breathing" of gas that makes rebreathers ideal for long duration dives, efficient decompression when the gas mix is adjustable, and for the observation of animals in the wild due to the lack of noisy bubbles. These characteristics also make rebreathers ideal for military use, such as when military divers are engaged in covert action or when performing mine clearance where bubbles could potentially set off an explosion.
Open circuit scuba equipment is occasionally used by commercial divers working on sites where surface supplied equipment is unsuitable, such as around raised structures like a water tower, or in remote locations where it is necessary to carry equipment to the dive site. A scuba set is an independent breathing set that provides a scuba diver with the Breathing gas necessary to breathe underwater during Scuba diving. A water tower, watershed, or elevated water tower is a large elevated water storage container Normally, for comfort and for practicality, a full face mask such as those manufactured by Kirby Morgan will be used to allow torches and video cameras to be mounted onto the mask. A full-face diving mask is a type of Diving mask that seals the whole of the diver's Face from the water and contains a mouthpiece or Demand valve The benefit of full-face masks is that they can normally be used with surface supplied equipment as well, removing the need for the diver or the company to have two sets of expensive equipment.
Surface supplied
This is, perhaps, the most common type of equipment used in professional diving, and the one most recognised by the public, made familiar through films such as The Abyss. Surface supplied diving (also known as Hooka diving refers to divers using equipment supplied with Breathing gas using an umbilical cord The Illustrated London News was a Magazine founded by Herbert Ingram and his friend Mark Lemon, the editor of Punch The Abyss is a Science fiction film that was written and directed by James Cameron in 1989.
Surface Supplied equipment can be used with full face masks or diving helmets. A full-face diving mask is a type of Diving mask that seals the whole of the diver's Face from the water and contains a mouthpiece or Demand valve Diving helmets are worn by mainly by professional divers engaged in Surface supplied diving. Helmets are normally to be found fitted with diver to surface communication equipment, and often with light sources and video equipment. The use of a full-face mask or a full diving helmet is down to requirements and personal preference, however the impact protection and warmth offered by a full diving helmet makes it popular for underwater construction sites and cold water work.
Breathing gas for the diver is piped down from the surface, through a long, flexible hose, called an umbilical. Air is the most common and only natural breathing gas. Other artificial gases either pure gases or mixtures of gases are used in breathing equipment and enclosed habitats such In addition to breathing gas, the umbilical may have additional hoses and cables for such things as communications equipment or hot water should the diver be using a hot water suit. The diver's breathing gas can is pumped down from either high pressure tanks or through a gas compressor. A diving cylinder, scuba tank or diving tank is used to store and transport high Pressure Breathing gas as a component of SCUBA (Self-Contained A gas compressor is a mechanical device that increases the Pressure of a Gas by reducing its Volume.
If the diver is to be working at extreme depths for a long period, the diver may live in a special underwater habitat called a diving chamber. A diving chamber or submersible chamber has two main functions as a simpler form of submersible vessel to take divers Underwater This type of surface supplied diving is known as saturation diving. Saturation diving is a diving technique that allows divers to remain at great depth for long periods of time The same technique for supplying breathing gas as regular surface supplied diving is used, with the diving bell receiving breathing gas and electricity from a diving support vessel on the surface. A diving support vessel is a Ship that is used as a floating base for Professional diving projects Due to the often extreme depths the diver is working at, specialised helium-based breathing gas mixtures are often used to prevent both nitrogen narcosis and oxygen toxicity which occurs at these extreme depths. Helium ( He) is a colorless odorless tasteless non-toxic Inert Monatomic Chemical Nitrogen narcosis or inert gas narcosis is a reversible alteration in Consciousness in scuba divers at depth Oxygen toxicity or oxygen toxicity syndrome (also known as the " Paul Bert effect" or the "Lorrain Smith effect" describes harmful effects caused
Branches of professional diving
Commercial diving
Offshore diving
Offshore diving is the most well known branch of commercial diving, with divers working in support of the exploration and production sector of the oil and gas industry in places such as the Gulf of Mexico in the United States and the North Sea in the United Kingdom and Norway. See also Extraction of petroleum The Petroleum industry is usually divided into three major components Upstream Midstream and downstream. The Gulf of Mexico ( Spanish: Golfo de México) is the ninth largest Body of water in the world The North Sea is a marginal, Epeiric sea of the Atlantic Ocean on the European Continental shelf. The work in this area of the industry typically revolves around the maintenance of oil platforms and the building of underwater structures used in the production process. An oil platform or oil rig is a large structure used to house workers and machinery needed to drill and/or extract oil and Natural gas through wells
For many newly qualified divers, this is the entry point to the industry, the lack of experienced divers and the excess of qualified divers within the industry push down wages for younger, less experienced divers beginning their careers. The low wages, relative inexperience of the workforce combined with difficult and dangerous operating conditions make offshore diving the most dangerous area of employment for professional divers.
Equipment used for offshore diving tends to be surface supplied equipment but this does vary depending on the nature of the work and location, for instance Gulf of Mexico based divers may use wetsuits whilst North Sea divers need drysuits or even hot water suits due to the temperature of the water.
Inland / onshore diving
Inland or onshore diving is very similar to offshore diving in terms of the nature of work and the equipment used, the work often being in support of land based civil engineering projects, with the majority of the work either underwater survey or engineering work. Civil engineering is a professional engineering discipline that deals with the design construction and maintenance of the physical and naturally built Hydrographic survey in its strictest sense is the process of gathering information about navigable waters for the purposes of safe navigation of vessels The number of dive sites this covers is varied however, and divers can be found working in harbours and lakes, in rivers and around bridges and pontoons, with the bulk of this work being undertaken in freshwater. A harbor or harbour (see spelling differences) or haven, is a place where ships may shelter from the Weather or are stored A bridge is a Structure built to span a Gorge, Valley, Road, railroad track, River, Body of water A pontoon is a flat-bottomed Boat or the floats used to support a structure on water Freshwater is a word that refers to bodies of water such as Ponds lakes rivers and streams containing low concentrations of dissolved Salts and other Total dissolved Onshore divers typically earn less per hour than their colleagues who work offshore, but the ability to work from home for many divers is an advantage.
The equipment used does depend on the nature of the work and location, but normally a mixture of SCUBA and Surface supplied diving equipment is used by divers and their employers. A scuba set is an independent breathing set that provides a scuba diver with the Breathing gas necessary to breathe underwater during Scuba diving. Surface supplied diving (also known as Hooka diving refers to divers using equipment supplied with Breathing gas using an umbilical cord
HAZMAT diving
HAZMAT diving is widely regarded as the most dangerous branch of the commercial diving industry, employing highly skilled and experienced staff.
Typical work involves diving into raw sewage or dangerous chemicals, such as paper pulp, liquid cement, or oil sludge. Paper pulp is a Material for making Paper. It is usually Cellulose fibre, and could be Wood pulp or Non-wood pulp See In the most general sense of the word a cement is a binder a substance which sets and hardens independently and can bind other materials together Oil sludge or black sludge is a Solid or Gel in Motor oil caused by the oil gelling or solidifying usually at temperatures lower than 100 degrees This causes special requirements:
- The divers need to be vaccinated against diseases such as hepatitis and tetanus. Vaccination is the administration of Antigenic material (the Vaccine) to produce immunity to a disease Hepatitis (plural hepatitides) implies injury to the Liver characterized by the presence of Inflammatory cells in the tissue of Tetanus is a medical condition that is characterized by a prolonged contraction of Skeletal muscle fibres
- The dive company needs to have specialist plans in place for decontamination of the diver and equipment after a dive.
- A way to recover the diver if something goes wrong.
- The diver's weighting may need to be adjusted, if he is diving in a liquid whose density is much different from the density of water. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different
The main tasks a diver can be found to be doing include:
- Essential maintenance of underwater valves and sluice gates.
- Repairing damaged pipelines.
- Pollution control work to contain, control, and clean up after a pollution incident. Pollution is the introduction of contaminants into an environment that causes instability disorder harm or discomfort to the physical systems or living organisms they are in
- Some divers are required to dive into landfill sites to maintain the pumping equipment, vital in preventing landfill sites from filling up with rainwater and contaminating the water table. For other uses see Water treatment and Land reclamation. A landfill, also known as a dump (and historically as For information on Wikipedia project-related discussions see WikipediaVillage pump.
- Welding inside live sewers or working in septic tanks. Description A septic tank generally consists of tanks between the size of 1000 and 2000 gallons (4000 - 7500 litres which is connected to an inlet wastewater pipe at one end and
- Miscellaneous repairs and finding lost objects.
- Finding bodies.
Sewer diving is often considered the most dangerous of all the HAZMAT jobs due to the diseases contained in raw sewage and because syringes and glass find their way into the raw sewage, creating risks of contracting diseases. A syringe is a simple piston Pump consisting of a plunger that fits tightly in a tube A disease is an abnormal condition of an organism that impairs bodily functions and can be deadly
Divers working in an environment harmful to their health will always wear a full drysuit with thick gloves which are attached directly to the suit, the helmet and boots will also attach directly to the drysuit, this allows the gloves, boots, suit and helmet to be pressured in order to prevent ingress of liquid should a puncture occur. Normally, to achieve this, a diver will use a free flow diving helmet which continually supplies enough air for the diver to breathe plus an additional amount to pressurise the suit; a free flow helmet has a much lower chance of leakage through the exhaust valve compared with a demand helmet where the exhaust valve is dormant during the inhalation stage of the diver breathing.
The drysuit will be made from a material resistant to whatever hazard the diver faces: normally the diver wears a vulcanised rubber drysuit, but occasionally a neoprene or tri-laminate suit is needed. A dry suit or drysuit provides Thermal insulation or passive thermal protection to the wearer while immersed in water and is worn by divers, Neoprene or polychloroprene is a family of synthetic Rubbers that are produced by Polymerization of Chloroprene. Often, a diver will wear extra protection over their drysuit to decrease the chance of a puncture: leather, PVC, and nylon coveralls are used for this purpose. Leather is a material created through the Tanning of hides and Skins of Animals primarily Cattlehide The Tanning process Overview Nylon is a Thermoplastic silky material first used commercially in a nylon- Bristled Toothbrush (1938 followed more famously by Distinguish from Overhaul. An overall is a type of Garment which is usually used as Protective clothing when working
In such diving light is often very scarce, so most such divers rely on touch to guide them, and are usually connected via rope to the surface.
Links:
Nuclear diving
Nuclear diving is similar to HAZMAT diving; the difference is the exposure to radiation instead of a water borne contaminant. Radiation, as in Physics, is Energy in the form of waves or moving Subatomic particles emitted by an atom or other body as it changes from a higher energy To this end, different precautions are required for nuclear diving, mainly, equipment which will not absorb radiation and pose a disposal problem after several dives.
Heat stress can also be a danger for the diver, in which case a cold water suit may be used: the cold water suit is a special canvas coverall which floods the outside of the diver's drysuit with chilled water, countering the dangerously high ambient water temperature. A dosimeter is used to ensure that the diver does not receive a dangerous dose of radiation during the dive, assisting in calculating the maximum length of the dive. A dosimeter is any device used to measure an individual's exposure to a hazardous environment particularly when the hazard is cumulative over long intervals of Time In addition the dosimeter can also be used to find radiation hotspots, which can indicate areas in need of repair.
Scientific diving
Scientific diving is the use of diving techniques by scientists to study underwater what would normally be studied by scientists on land. Scientific divers are normally qualified scientists first and divers second, who use diving equipment and techniques as their way to get to the location of their fieldwork. Underwater archeology, marine biology and geology are examples of sciences pursued underwater. Underwater archaeology is the study of past Human life behaviours and cultures using the physical remains found in salt or Fresh water or buried beneath Marine biology is the scientific study of living Organisms in the Ocean or other marine or Brackish bodies of water Geology (from Greek γη gê, "earth" and λόγος Logos, "speech" lit Some scientific diving is carried out by universities in support of undergraduate or postgraduate research programs. In the United States scientific diving is permitted by the Occupational Safety and Health Administration to operate under an alternative consensual standard of practice that is maintained by the American Academy of Underwater Sciences. The United States Occupational Safety and Health Administration (OSHA is an agency of the United States Department of Labor. The American Academy of Underwater Sciences ( AAUS) is a group of scientists who research underwater or into underwater matters The perspectives on the regulation of scientific diving of two founders of the American Academy of Underwater Sciences: Lloyd Austin and Phil Sharkey can be found in OCEANS Volume: 15, pp460- 463.
To be able to avail itself of the Scientific Diving Exemption the institution under whose auspices the work is carried out must meet four tests:
- 1. The Diving Control Board consisting of a majority of active scientific divers must have autonomous and absolute authority over the scientific diving program's operations.
- 2. The purpose of all projects using scientific diving is the advancement of science; therefore, information and data resulting from the project are non-proprietary.
- 3. The tasks of a scientific diver are those of an observer and data gatherer. Construction and trouble-shooting tasks traditionally associated with commercial diving are not included within scientific diving.
- 4. Scientific divers, based on the nature of their activities, must use scientific expertise in studying the underwater environment and, therefore, are scientists or scientists in training.
Government bodies such as the United States Environmental Protection Agency and the UK Environment Agency carry out scientific diving to recover samples of water, marine organisms and sea, lake or riverbed material to examine for signs of pollution. The Environment Agency (Asiantaeth yr Amgylchedd is a Non-Departmental Public Body of the Department for Environment Food and Rural Affairs and an Assembly
Equipment used varies widely in this field, but surface supplied equipment though quite uncommon in the UK is growing in popularity in the U. S. The short number of dives made by scientific divers in normally quite shallow water, and the UK governmental regulations that make surface supplied equipment cumbersome, when combined with a need for easy transportation make surface supplied gear uneconomic and undesirable for UK scientists to use.
The two standard references for Scientific Diving Operations are:
Flemming, N. C. , Ed. ; Max, M. D. (Ed) Code of Practice for Scientific Diving: Principles for the Safe Practice of Scientific Diving in Different Environments. UNESCO Technical Papers in Marine Science 53.
Joiner James T. (ed), NOAA Diving Manual: Diving for Science and Technology, Fourth Edition, 2001, U. S. Department of Commerce, National Technical Information Service, (ISBN: 0941332705)
Media diving
Media Diving is a term that covers underwater photography and underwater filming. Underwater photography is the process of taking Photographs while under water Media Diving is often carried out in support of television documentaries, such as the BBC series Planet Earth or Hollywood blockbusters, with feature films such as Titanic and The Perfect Storm featuring underwater photography or footage. Planet Earth is an Emmy Award and Peabody Award -winning BBC Nature documentary series narrated by David Attenborough and Titanic is a 1997 Disaster film directed written co-produced and co-edited by James Cameron about the sinking of the RMS ''Titanic'' The Perfect Storm is a 2000 Film adapted from the book of the same title by Sebastian Junger. Media divers are normally highly trained camera operators who use diving as a method to reach their workplace, although some underwater photographers may start as recreational divers and move on to make a living from their hobby.
Equipment in this field is varied with SCUBA and surface supplied equipment used, depending on requirements, but rebreathers are often used for wildlife related work as they are normally quiet, release few or no bubbles and allow the diver a lengthy bottom time with a reduced risk of frightening off the subject at hand. A rebreather is a type of Breathing set that provides a Breathing gas containing Oxygen and recycled exhaled gas
Military and naval diving
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Military diving covers all types of diving carried out by military personnel. A Clearance Diver was originally a specialist naval diver who used Explosives Underwater to remove obstructions to make harbours and shipping channels safe A frogman is someone who is trained to dive or swim in a military capacity often in combat There are a number of different specialisations for a military diver to choose, some depend on which branch of the military they've joined or where the military needs more divers. Typical offensive activities include underwater demolition, infiltration and sabotage, this being the type of work elite regiments such as the UK Special Boat Service or the USA Navy Seals carry out. The Special Boat Service ( SBS) is the Special forces unit of the British Royal Navy. Defensive activities are centered around countering the threat of enemy special forces and enemy anti-shipping measures, and typically involve defusing mines, searching for explosive devices attached to the hulls of ships, and locating enemy frogmen in the water. In most countries special forces (SF is a generic term for highly-trained Military teams/units that conduct specialized operations such as Reconnaissance A naval mine is a self-contained Explosive device placed in water to destroy Ships or Submarines Unlike Depth charges mines are deposited A frogman is someone who is trained to dive or swim in a military capacity often in combat
Military divers need equipment which hides their position and prevents explosives from being set-off, and to this end, they use rebreathers which produce few or no bubbles on the surface, and which contain no magnetic components, this continues down to the design of their diving suit, which will normally have a non-magnetic zip, and the face-mask may be fitted with special anti-reflective glass. A rebreather is a type of Breathing set that provides a Breathing gas containing Oxygen and recycled exhaled gas In Physics, magnetism is one of the Phenomena by which Materials exert attractive or repulsive Forces on other Materials. Some navies have gone further and given their divers special contact lenses instead of large face-masks to cut down on the risk of a reflection. A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the Cornea
Naval diving is the military term for commercial diving, and is drastically different from military diving. Naval divers work to support maintenance and repair operations on ships and military installations. Typical tasks include changing propellers or fitting replacement anodes. An anode is an Electrode through which Electric current flows into a polarized electrical device Naval divers may also work to recover downed aircraft, submarines, missiles and other military hardware. Their equipment is derived from commercially available equipment, with the US Navy using versions of the Kirby Morgan helmets and full-face masks amongst other equipment.
Experimental diving, is conducted by the US Navy's Experimental Diving Unit (NEDU) and involves meeting military needs through the research and development of diving practices and diving equipment, testing new types equipment and finding new and safer ways to perform dives and related activities. The US NEDU was responsible for much of the early experimental diving work to calculate decompression tables and has since worked on such developments as heated diving suits powered by radioactive isotopes and mixed gas diving equipment, while the British equivalent (The Admiralty Experimental Diving Unit) perfected the Mark 10 submarine escape suits utilized by both the Royal Navy and the US Navy. Dive Tables, Decompression Tables or Tables are printed cards or booklets that allow divers to determine for a particular dive profile and breathing gas [2]
Police diving
Police divers are normally police officers who have been trained in the use of diving techniques to recover evidence and occasionally bodies from rivers, canals and the sea. Police diving is a branch of Professional diving carried out by Police services Evidence in its broadest sense includes anything that is used to determine or demonstrate the Truth of an assertion They may also be employed in searching shipping for contraband substances fitted to the outside of hulls to avoid detection. A hull is the body of a Ship or Boat. It is a central concept in floating vessels as it provides the Buoyancy that keeps the vessel from sinking The equipment they use depends on requirements, but the requirement for communications at some sites does often require the use of full-face masks with communication equipment, either with SCUBA or surface supplied equipment.
Dive instruction
There are two differing types of dive instructor. Some train recreational divers while others train professional divers.
Recreational dive instructors differ from other types of professional divers as they normally don't require a professional level qualification, but a relevant recreational qualification from a recognised training agency such as GUE, NAUI, PADI, SSI, YMCA or BSAC, which permits them to teach. Recreational diving or sport diving is a type of diving that uses SCUBA equipment for the purpose of leisure and enjoyment This page lists SCUBA Diver training organizations Commercial diving: Surface supplied air training organizations International The National Association of Underwater Instructors (NAUI is a United States -based SCUBA diver training organization concerned with promoting dive The Professional Association of Diving Instructors ( PADI) is the world's largest Recreational diving membership and diver training organization founded The Young Men's Christian Association (" YMCA " or " the Y " was founded on June 6, 1844 in London England by a young man Dive instructors teach a wide variety of skills from entry-level diver training for beginners, to diver rescue for intermediate level divers and technical diving for more experienced divers. Diver training is the process of developing skills and building experience in the use of Diving equipment and techniques so that the diver is able to dive safely and Diver rescue, following an accident is the process of avoiding or limiting further exposure to diving hazards and bringing a SCUBA diver to safety Technical diving (sometimes referred to a Tec diving) is a form of Scuba diving that exceeds the scope of Recreational diving (although the vast majority They often operate from dedicated dive centres at coastal sites or through hotels in popular holiday resorts or simply from local swimming pools. Initial training is carried out mainly on conventional SCUBA equipment but with the increasing use of rebreathers, their use is also taught. A scuba set is an independent breathing set that provides a scuba diver with the Breathing gas necessary to breathe underwater during Scuba diving. A rebreather is a type of Breathing set that provides a Breathing gas containing Oxygen and recycled exhaled gas Not all dive instructors are professionals; many instructors are amateurs with careers outside the diving industry.
Commercial dive instructors normally require professional diving qualifications. They typically teach trainee commercial divers how to operate types of diving equipment and typical underwater tools they will use in the course of their work. The fundamental item of diving equipment used by divers is the SCUBA equipment, such as the Aqualung or Rebreather. Commercial dive instructors will use similar equipment to commercial divers in the course of their work.
Training
In the UK, any person diving at work is required to hold a relevant qualification approved by the Health and Safety Executive (HSE). The Health and Safety Executive (HSE is a United Kingdom Non-departmental public body. In the UK, diving schools work towards a standard HSE approved qualification, whilst divers who have trained overseas may find their existing qualifications meet the necessary HSE standards, if not, additional training may be required. HSE approved qualifications are well known around the world and due to the stringent requirements of HSE qualifications, most diving qualifications around the world are designed to meet HSE standards, allowing any trained diver to work in the UK, an important location due to the North Sea oil industry. North Sea oil refers to oil and Natural gas ( Hydrocarbons produced from Oil reservoirs beneath the North Sea. The stringent requirements of the HSE qualifications make then a common requirement around the world for employers looking for new staff.
There are several different HSE qualifications, each focusing on a different type of equipment or type of diving activity, for instance the HSE Scuba qualification allows the holder to use only SCUBA equipment. Training usually takes place at a residential school, with courses taking anything between 9 and 13 weeks although divers with existing qualifications, such as former military divers can take courses which build on their existing knowledge and experience. During training, divers will be taught how to use common types of diving equipment (nearly every school trains divers to use the Kirby Morgan equipment) and how to carry out underwater construction techniques such as welding and cutting. In the fields of Architecture and Civil engineering, construction is a process that consists of the Building or assembling of Infrastructure Welding is a fabrication process that joins materials usually Metals or Thermoplastics by causing coalescence.
In addition to physical training, there is a large amount of classroom work, with divers being trained subjects such as basic gas laws and decompression tables. This articles outlines the historical development of the laws describing ideal gases Dive Tables, Decompression Tables or Tables are printed cards or booklets that allow divers to determine for a particular dive profile and breathing gas First Aid courses are normally also a requirement for trainee divers, with the emphasis placed on dealing with decompression and other diving related injuries. First aid is the provision of initial care for an Illness or Injury. Divers face specific physical and Health Risks when they go Underwater (e
References
See also
For scientific and archaeological applications for which diving is needed see:
For other diving activities
External links
- USA Government Regulations for Commercial Diving (federal code)
- UK Health and Safety Executive Website (UK Government)
- Australia Diver Accreditation Scheme Website (Australian Government)
- Diving Heritage Life of a nuclear diver
- Sea Research Society
- Diving Diseases Research Centre
- History of Commercial Diving
- Becoming a Commercial Diver - a report
- Brief history and overview of Commercial Diving
- Site with extensive information about commercial diving
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