TOMAS NAUTICA Yachting 2017 (full name ""Attitudes and expenditures of yachtsmen in Croatia"") is a primary research. Data are collected directly from the tourists-yachtsmen. It is conducting continuously since 2001. The 2017 survey has been conducted for the fifth time (2001, 2004, 2007, 2012 and 2017). The 2017 survey has been conducted with the support of the Ministry of Tourism of the Republic of Croatia, within the broader project Tourism Satellite Account for Croatia for 2016: Development of statistical information base and estimation of total inbound tourism consumption. The survey methods, based on general methods of TOMAS surveys, are specifically adjusted for the segment of nautical-yachting tourism demand. The survey methods are a prerequisite of obtaining reliable and representative assessment of nautical-yachting demand characteristics in Croatia. The content of the TOMAS NAUTICA Yachting 2017 Survey includes: socio-demographic profile of yachtsmen, the main characteristics of voyage and stay in marinas and ports, activities during the voyage, including on-shore activities, expenditures and their structure, the main strengths and weaknesses and the overall Croatian nautical tourism products, and competitiveness of the overall Croatian nautical tourism product in relation to competitive international sailing destination. The survey instrument was a structured questionnaire on eleven languages. Method of data collection was computer aided personal interview (CAPI). A stratified random sample was used in the survey with strata defined by vessel’s ownership, month and country of origin of yachtsmen. The total sample size was 1,666 respondents from 14 generating markets. Data were collected between July and October 2017, in 25 marinas and 8 town ports along the coast and on the islands. The survey findings are published by the Institute for Tourism in an e-book with the same name. Besides the research methods, main results and major changes compared to 2012 survey, all 2017 survey results are presented in tables (in Croatian and English), by the vessel ownership (Croatian charter and yachtsmen on other vessels), country of origin (separately for Croatian charter and yachtsmen on other vessels) and by the length of vessel.