The main objective is to present new, integrated sensors that can be implemented on a variety of fixed and mobile platforms and have multiple functionalities including measurements of key parameters useful to a number of objectives, ranging from more precise monitoring and modeling of the marine environment to an improved assessment of fish stocks. The workshop is based on the need for innovative sensors to improve and expand marine observations as part of a more comprehensive approach ecosystem management. The workshop will also address means of underwater observations based on other innovative sensor systems. This includes the first outcome of the project NeXOS aimed at improving the temporal and spatial coverage, resolution and quality of marine observations. This will be achieved through the development of cost-efficient innovative and interoperable in-situ sensors deployable from multiple platforms, as well as web services for a broad range of key domains and applications. Finally European projects connected to NeXOS will be presented. The language of the workshop will be English only. All papers uploaded after the abstract acceptance will be published in IEEE Explore. Student contributions are welcome for participating to the Sea Tech Week / IEEE OES Student Poster Competition.