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Sound is a persistent yet dynamic component of the marine environment, reflecting both physical and biological properties. Whereas light can only travel tens of meters in the ocean, sound is able to travel tens to thousands of kilometers under certain conditions, revealing information at specific times and places. In addition, underwater sound provides opportunities for sustainable development and blue economy growth that aren’t readily available with other technologies. For example, the melting rate of Arctic ice and the health of coral reefs can be estimated from acoustic measurements (Becker et al., 2023). However, underwater acoustics is a complex topic, requiring specialized education and equipment. To expand the capacity of underwater acousticians requires dedicated educational opportunities and low-cost equipment and analysis resources. 

Capacity sharing in the ocean sciences is essential for addressing pressing environmental challenges and fostering sustainable stewardship of marine ecosystems. This article focuses on three important capacity-sharing programs operating in Africa: Early Career Ocean Professionals (ECOP) Africa, Citizen Observation of Local Litter in Coastal Ecosystems (COLLECT) (a project of the Partnership for Observation of the Global Ocean), and Mundus Maris Africa. ECOP Africa, a pioneering platform for early career ocean professionals, emphasizes mentorship, training, and knowledge exchange to empower young marine scientists across the continent. Through dynamic programs and events, ECOP Africa is catalyzing interdisciplinary collaboration and inspiring the next generation of ocean leaders. Similarly, COLLECT leverages citizen science to tackle plastic pollution in coastal environments. By training secondary school students as “citizen scientists,” COLLECT has not only generated critical data on the distribution and abundance of coastal debris but also fostered environmental awareness and local engagement. These initiatives demonstrate the power of inclusive, community-driven approaches to capacity sharing in the ocean sciences. They highlight the transformative potential of combining open science, education, and international collaboration to address global challenges such as plastic pollution and climate change while empowering local communities to take active roles in preserving their marine environments. 

One of the biggest barriers to conducting ocean science around the globe is limited access to computational tools and resources, including software, computing infrastructure, and data. Open tools, such as open-source software, open data, and online computing resources, offer promising solutions toward more equitable access to scientific resources. Here, we discuss the enabling power of these tools in under-resourced and non-English speaking regions, based on experience gained in the organization of three independent programs in West African, Latin American, and Indian Ocean nations. These programs have embraced the “hackweek” learning model that bridges the gap between data science and domain applications. Hackweeks function as knowledge exchange forums and foster meaningful international and regional connections among scientists. Lessons learned across the three case studies include the importance of using open computational and data resources, tailoring programs to regional and cultural differences, and the benefits and challenges of using cloud-based infrastructure. Sharing capacity in marine open data science through the regional hackweek approach can expand the participation of more diverse scientific communities and help incorporate different perspectives and broader solutions to threats to marine ecosystems and communities. 

The Coastal Ocean Environment Summer School In Nigeria and Ghana (COESSING; https://coessing.org) has been run for one week every year since 2015. The school, an endorsed project of the United Nations Decade of Ocean Science for Sustainable Development (2021–2030), has provided a platform for approximately 1,000 scientists from Africa, the United States, and Europe to exchange scientific knowledge, to network, to learn, and to collaborate. Our interdisciplinary, multicultural, and multi-institutional approach offers a model for knowledge exchange across the globe and across different educational levels.