This 3-day scientific and technical workshop is an initiative of the AtlantOS project supported by contributions from the AORA-CSA project. The idea of a joint event was motivated by an attempt to better integrate activities in AtlantOS across work packages, as well as to better involve international participants in the process. The focus will be on AtlantOS WP6 and WP3 activities, thus aiming at better integrating the project’s cross-cutting issues, emerging networks and technological innovation activities with the enhancement of the Atlantic network of autonomous observing systems, fixed and mobile. While there is a predefined focus, the event is also open to all AtlantOS work-package and task leaders interested in contributing. The event is also open to international participants who have an interest in joining and contributing to the AtlantOS community and initiative. Contributions of AORA-CSA are important to the success of the workshop as these will provide an overview of the strategy across the Atlantic and help observing networks align with the requirements of the Galway statement. AORA-CSA contributions will mainly include updating attendees of the AtlantOS community on the AORA-CSA initiative, the project progress with respect to ocean observation (WP5) and the sharing of infrastructures (WP10) activities, support participation by wider Atlantic community and generally help better integrate international perspectives.