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Scuba Educators International
Scuba Educators International (SEI) (also known as SEI Diving) is a non-for-profit underwater diving training organisation established in the United States during 2008 to continue the underwater diving training program known as the YMCA SCUBA Program which ceased operation in 2008. Origins SEI was founded in 2008 by a group of former senior YMCA SCUBA instructors following the announcement of the closure of the YMCA Scuba Program by the YMCA of the USA with the intention of continuing the YMCA Scuba Program under a new banner. The new agency was conceived as being a non-for-profit organisation that would operate world-wide and in complete independence of the YMCA of the US, “but will continue to share philosophies and dedication to the highest quality education in the (diving) industry”. Recognition During 2010, SEI entered in an agreement with the Underwater Society of America (USOA) to issue CMAS International Diver Training Certificates. SEI is a member of the Diving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YMCA SCUBA Program
YMCA SCUBA Program (also known as Y-SCUBA) was an underwater diving training program operated by YMCA of the USA from 1959 to 2008. It was the first nationally organised underwater diving instruction program offered in the United States of America. A program with a similar content is now delivered by Scuba Educators International, an organisation founded by a group of former senior YMCA SCUBA instructors in 2008. Origins In 1954, YMCA of the US and other interested parties under the auspices of the Council for National Cooperation in Aquatics commenced a study to look at the safety aspects of underwater diving. Findings of the study were outlined with the view of creating a course of training sufficient to produce ‘capable performance in those who elect to participate in… recreational (diving) activity’. A trial course was run during the late 1954 and early 1955 by YMCA of the USA using this outline. The material used in the course was then published in ''The Science of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Open Water Diver
Advanced Open Water Diver (AOWD) is a recreational scuba diving certification level provided by several diver training agencies. Agencies offering this level of training under this title include Professional Association of Diving Instructors (PADI), and Scuba Schools International (SSI). Other agencies offer similar training under different titles. Advanced Open Water Diver is one step up from entry level certification as a beginner autonomous scuba diver. A major difference between Autonomous diver equivalent Open Water Diver (OWD) certification and AOWD is that the depth limit is increased from . Prerequisite certification level for AOWD training is OWD or a recognized equivalent (ISO 24801-2). Certification requirements for AOWD includes theory learning and assessment, practical training and assessment, and a minimum requirement for number of logged dives, that varies between agencies. SSI requires 24 logged dives. PADI requires 5 dives on course, and the prerequisite is OWD whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Suit
A dry suit or drysuit provides the wearer with environmental protection by way of thermal insulation and exclusion of water, and is worn by divers, boaters, water sports enthusiasts, and others who work or play in or near cold or contaminated water. A dry suit normally protects the whole body except the head, hands, and possibly the feet. In hazmat configurations, however, all of these are covered as well. The main difference between dry suits and wetsuits is that dry suits are designed to prevent water from entering. This generally allows better insulation, making them more suitable for use in cold water. Dry suits can be uncomfortably hot in warm or hot air, and are typically more expensive and more complex to don. For divers, they add some degree of operational complexity and hazard as the suit must be inflated and deflated with changes in depth in order to minimize "squeeze" on descent or uncontrolled rapid ascent due to excessive buoyancy, which requires additional skills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underwater Search And Recovery
Underwater search and recovery is the process of locating and recovering underwater objects, often by divers, but also by the use of submersibles, remotely operated vehicles and electronic equipment on surface vessels. Most underwater search and recovery is done by professional divers as part of commercial marine salvage operations, military operations, emergency services, or law enforcement activities. Minor aspects of search and recovery are also considered within the scope of recreational diving. Professional search and recovery The scope of professional search and recovery includes the following applications: *Marine archeology - search for artifacts of historical interest and importance, and where applicable the recovery of such artifacts for study. *Marine salvage - search for lost material of value and recovery thereof *Environmental protection - search for environmentally undesirable material and disposal thereof *Forensic S&R - search for and recovery of material r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Diving
Ice is water frozen into a solid state, typically forming at or below temperatures of 0 degrees Celsius or Depending on the presence of impurities such as particles of soil or bubbles of air, it can appear transparent or a more or less opaque bluish-white color. In the Solar System, ice is abundant and occurs naturally from as close to the Sun as Mercury to as far away as the Oort cloud objects. Beyond the Solar System, it occurs as interstellar ice. It is abundant on Earth's surfaceparticularly in the polar regions and above the snow lineand, as a common form of precipitation and deposition, plays a key role in Earth's water cycle and climate. It falls as snowflakes and hail or occurs as frost, icicles or ice spikes and aggregates from snow as glaciers and ice sheets. Ice exhibits at least eighteen phases ( packing geometries), depending on temperature and pressure. When water is cooled rapidly (quenching), up to three types of amorphous ice can form depending on its his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrox
Nitrox refers to any gas mixture composed (excepting trace gases) of nitrogen and oxygen. This includes atmospheric air, which is approximately 78% nitrogen, 21% oxygen, and 1% other gases, primarily argon. In the usual application, underwater diving, nitrox is normally distinguished from air and handled differently. The most common use of nitrox mixtures containing oxygen in higher proportions than atmospheric air is in scuba diving, where the reduced partial pressure of nitrogen is advantageous in reducing nitrogen uptake in the body's tissues, thereby extending the practicable underwater dive time by reducing the decompression requirement, or reducing the risk of decompression sickness (also known as ''the bends''). Nitrox is used to a lesser extent in surface-supplied diving, as these advantages are reduced by the more complex logistical requirements for nitrox compared to the use of simple low-pressure compressors for breathing gas supply. Nitrox can also be used in hyper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diver Rescue
Beaching a casualty while providing artificial respiration Diver rescue, following an accident, is the process of avoiding or limiting further exposure to diving hazards and bringing a diver to a place of safety. A safe place is often a place where the diver cannot drown, such as a boat or dry land, where first aid can be administered and from which professional medical treatment can be sought. In the context of surface supplied diving, the place of safety for a diver with a decompression obligation is often the diving bell. Rescue may be needed for various reasons where the diver becomes unable to manage an emergency, and there are several stages to a rescue, starting with recognising that a rescue is needed. In some cases the dive buddy identifies the need by personal observation, but in the more general case identification of the need is followed by locating the casualty. The most common and urgent diving emergencies involve loss of breathing gas, and the provision of emergen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Divemaster
A divemaster (DM) is a role that includes organising and leading recreational dives, particularly in a professional capacity, and is a qualification used in many parts of the world in recreational scuba diving for a diver who has supervisory responsibility for a group of divers and as a dive guide. As well as being a generic term, 'Divemaster' is the title of the first professional rating of many training agencies, such as PADI, SSI, SDI, NASE, except NAUI, which rates a NAUI Divemaster under a NAUI Instructor but above a NAUI Assistant Instructor. The divemaster certification is generally equivalent to the requirements of ISO 24801-3 Dive Leader. The BSAC recognizes several agencies' divemaster certificates as equivalent to BSAC Dive Leader, but not to BSAC Advanced Diver. The converse may not be true. The certification is a prerequisite for training as an instructor in recreational diving with the professional agencies except NAUI, where it is an optional step, becau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master Scuba Diver
Master Scuba Diver (MSD) is a scuba diving certification or recognition level offered by several North American diver training agencies, such as the National Association of Underwater Instructors (NAUI), the Professional Association of Diving Instructors (PADI), Scuba Diving International (SDI), and Scuba Schools International (SSI). Other agencies (e.g., The International Association of Nitrox and Technical Divers) offer similar programs under other names, such as "Elite Diver". Each of these (and other) agencies touts their program at this level as the highest, non-leadership program. Most organizations have a minimum age requirement of 15 to undertake the Master Scuba Diver course, although some organizations do permit certification of "Junior" Master Scuba Divers. Methodology Different agencies take different approaches to this program creating both a disparate level of indicated diver competence both within most agencies as well as from agency to agency. The specific met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Water Diver
Open Water Diver (OWD) is an entry-level autonomous diver certification for recreational scuba diving. Although different agencies use different names, similar entry-level courses are offered by all recreational diving agencies and consist of a combination of knowledge development (theory), confined water dives (practical training) and open water dives (experience) suitable to allow the diver to dive on open circuit scuba, in open water to a limited depth and in conditions similar to those in which the diver has been trained or later gained appropriate experience, to an acceptable level of safety. Minimum training standard The OWD training standard of most agencies complies with the minimum requirements of international Standard ISO 24801-2. Autonomous diver. Agencies issuing certification named Open Water Diver The "Open Water Diver" certification name is used by the Professional Association of Diving Instructors (PADI), Scuba Schools International (SSI), the National Ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
