In 2015 the Hydrographic Institute took the initiative to organize a small marine technology workshop where instrumentation laboratories, marketing agents, researchers, economic operators in the field of the sea, public and private entities responsible for operations at sea and other agents with direct or indirect interests in the marine environment, were invited to share experiences, successes and difficulties, criticisms, aspirations and perspectives of development. From this workshop resulted numerous initiatives. National companies that have obtained representations of foreign manufacturers, international partnerships for development and sharing of know-how and even partnerships for national and international R&D projects. Over more than 100 people attended to the workshop and had at their disposal an exhibition area, where the invited entities presented their products and two days of plenary sessions where the discussion was incited, on subjects related to sea technologies. Given the success of this first initiative, we were challenged to organize a second edition of the MarineTech on November 2017, this time in the north of Portugal at the Cruise Terminal of Leixões Harbour, in partnership with the Interdisciplinary Center for Marine and Environmental Research - CIIMAR and with the support of the FORUM OCEANO and the Administration of Douro and Leixões Harbour – APDL and Forum Oceano with similar or relevant success. Thus, we are encouraged to organize a third edition, this time in Estoril (Estoril Congress Center), from 3rd to 5th December 2019. This year Marinetech will include also the international workshop «Linking Earth Observation data and Sustainable Development across the Atlantic» which aims at bringing together different marine-related stakeholders from Atlantic countries and Earth Observation experts, with the goal to discuss and establish connections between satellites derived data and sustainable development.