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National Dive League (NDL) is officially licensed as training and certifying organization in accordance with EN and ISO standards.

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Following an audit by the European Dive Federation (EUF) and the Austrian Institute of Standardization in accordance with the EN (Certification System in the European Union) and ISO (International Organization for Standardization) standards, the training levels in the NDL system were matched to the training levels according to EN and ISO, which all the leading certification organizations in the field of nonprofessional diving training must correspond to.

Correspondence table:

Since June 1, 2007, the NDL (professional and nonprofessional) licenses indicate compliance with EN and ISO standards.

The table of correspondence of certifying organizations with European and international standards can be found on the website of the EUF and the Austrian Institute of Standardization.