Scuba Diving
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- Mantis Dive
- Scuba and technical diving courses. Gear sales, hire and service. South east Queenslands deep wreck diving specialists. A full range of technical courses for three different certification agencies.
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- National Diving and Activity Centre (NDAC)
- Description of facilities for training at technical dive training centre in the UK.
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- On the air....
- Information about the physics of technical diving, including the influences of inert gases on decompression and diver insulation. Decompression calculations using the Varying Permeability Model (VPM) bubble model.
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- OxyCheq
- Sells oxygen sensors for all types of rebreathers and O2 analyzers. They also sell an oxygen analyzer kit that includes the sensor.
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- DRI / Dive Rescue International
- Dive Rescue International 28 certification levels in SCUBA rescue, recovery and underwater investigation to law enforcement, fire rescue, SAR and EMS personnel, since 1977.
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- ESA European Scuba Agency
- International diving training agency which provides programs, products and services to diving professionals. Includes description of certifications, recognitions, news, and contact information.
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- Global Underwater Explorers
- Organized to provide the diver with safety oriented diving programs with an emphasis on environmental protection and personal enjoyment.
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- HSA International
- The Handicapped Scuba Association is an independent training and certifying agency that specializes in recreational diving for people with disabilities.
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- NAUI - National Association of Underwater Instructors
- International nonprofit training organization with certifications from skin diver through instructor course director. Includes information about courses, policies, and dive centers.
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- PDIC - Professional Diving Instructors Corporation
- An international training and certification agency with instructors and training facilities located worldwide.
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- Professional Scuba Inspectors.
- PSI offers worldwide training in Visual Cylinder Inspection and High Pressures Cylinder Safety. Includes class schedule, inspector notices, and supplies.
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- SAA - The Sub-Aqua Association
- Association of independent dive clubs in the United Kingdom. Includes information about courses, a schedule, a map of clubs, and photo galleries.
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- SSAC - Scottish Sub Aqua Club
- The Governing Body for the sport of scuba diving in Scotland. Established in 1953 and proud holder of one of the best safety records in amateur diving.
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- SSI - Scuba Schools International
- International organization offering training from snorkeling through Master Instructor. Includes course information, a schedule, online training, and a scuba rangers kids club.
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- TDI/SDI Middle East & Russia
- Provides a full range of technical and recreational courses. Includes affiliate dive centers, news and events, and contact information.
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- World Underwater Federation
- One of the oldest dive organizations in the world, and one that serves to coordinate standards among water sports and activities, including sub-diving, freediving, and spearfishing.
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- Aggressor Fleet Ltd.
- Fleet of live-aboard dive boats operating throughout a number of destinations in the Caribbean, South America, South Pacific, Egypt, and Central America.
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- Explorer Ventures
- Dedicated live-aboard dive vessels, the M/V Caribbean Explorer and M/V Nimrod Explorer. Offer diving lessons and vacations, in the Caribbean and Australia.