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  2. Technical diving - Wikipedia

    en.wikipedia.org/wiki/Technical_diving

    Technical diving (also referred to as tec diving or tech diving) is scuba diving that exceeds the agency-specified limits of recreational diving for non-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.

  3. Professional Association of Diving Instructors - Wikipedia

    en.wikipedia.org/wiki/Professional_Association...

    The Professional Association of Diving Instructors (PADI) is a recreational diving membership and diver training organization founded in 1966 by John Cronin and Ralph Erickson. [3] PADI courses range from entry level to advanced recreational diver certification.

  4. Smart TV - Wikipedia

    en.wikipedia.org/wiki/Smart_tv

    LG Electronics smart TV from 2011. A smart TV, also known as a connected TV (CTV), is a traditional television set with integrated Internet and interactive Web 2.0 features that allow users to stream music and videos, browse the internet, and view photos. Smart TVs are a technological convergence of computers, televisions, and digital media ...

  5. High-definition television in the United States - Wikipedia

    en.wikipedia.org/wiki/High-definition_television...

    High-definition television (HDTV) in the United States was introduced in 1998 and has since become increasingly popular and dominant in the television market. Hundreds of HD channels are available in millions of homes and businesses both terrestrially and via subscription services such as satellite, cable and IPTV.

  6. Recreational scuba certification levels - Wikipedia

    en.wikipedia.org/wiki/Recreational_scuba...

    Advanced Open Water Diver (PADI, SSI) CMAS** scuba diver is a certification for recreational scuba diving issued by the Confédération Mondiale des Activités Subaquatiques (CMAS). which indicate that the diver has been found competent to dive in open water to a maximum depth of 40 meters, accompanied by another diver with equivalent or higher ...

  7. Master Scuba Diver - Wikipedia

    en.wikipedia.org/wiki/Master_Scuba_Diver

    The NAUI Master Scuba Diver course [2] is one of such courses that has both skill based and academic component. The course was designed by Paul Heinmiller (NAUI 5141L) and Phil Sharkey (NAUI 4505L), [3] to meet a specific need that had been identified by the NAUI membership: a clearly defined course that provides, assesses, and certifies for all the academic and skills training required of a ...

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