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The programme specified in this document is used to introduce a non-diver to recreational scuba diving by means of a supervised, controlled dive experience and to encourage the participant to seek further training. This document specifies minimum programme content requirements for training organizations for introductory scuba experiences in recreational scuba diving. Under no conditions are these requirements considered to be a standard for the training and qualification of scuba divers. This document applies to programmes that include participants being taken into an open water environment. It does not apply to programmes that are exclusively conducted in a confined water environment (such as swimming pools). This document also specifies the conditions under which this service is to be provided, which supplement the general requirements for recreational diving services specified in ISO 24803. This document (EN ISO 11121:2017) has been prepared by Technical Committee ISO/TC 228 "Tourism and related services" in collaboration with Technical Committee CEN/TC 329 "Tourism services", the secretariat of which is held by DIN. The responsible German committee is Working Committee NA 159-02-01 AA "Tourismus-Dienstleistungen" ("Tourism Services") at DIN Standards Committee Services (NADL).