The National Academies is conducting Phase 2 of the Sustaining Ocean Observations activity. An ad hoc committee will plan a workshop to explore partnership and organizational models to foster efficiency, continuity, and quality of the most critical ocean observations to support the broad spectrum of applications and users, both now and in the future. This workshop is a follow up to a 2017 National Academies report, Sustaining Ocean Observations to Understand Future Changes in Earth's Climate, which described the value of the global ocean observing system and identified current challenges in sustaining ocean observations in the long term.