The crew of the Royal Research Ship Discovery, a scientific research vessel of the United Kingdom, recently deployed high-technology biogeochemical sensors onto existing ‘Overturning in the Subpolar North Atlantic Program’ (OSNAP) moorings in the Rockall Trough, a major deep-water area in the North Atlantic Ocean. By taking continuous measurements in this important yet remote location, the sensors will contribute much needed long-term biogeochemical data to further our understanding of the interactions occurring in our ocean.