The Joint Technical Commission for Oceanography and Marine Meteorology (JCOMM) of the World Meteorological Organization (WMO) and UNESCO’s Intergovernmental Oceanographic Commission (IOC) have released the 2018 Ocean Observing System Report Card. The report details the JCOMM global observation system, which is comprised of networks and sensors that provide information about atmosphere, ocean, ice, global weather, maritime hazards and maritime commerce,