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In 2016, the National Science Foundation (NSF) unveiled a set of "Big Ideas," 10 bold, long-term research and process ideas that identify areas for future investment at the frontiers of science and engineering (see https://www.nsf.gov/news/special_reports/big_ideas/index.jsp). The Big Ideas represent unique opportunities to position our Nation at the cutting edge of global science and engineering leadership by bringing together diverse disciplinary perspectives to support convergence research. As such, when responding to this solicitation, even though proposals must be submitted to the Education and Human Resources (EHR) Directorate/Division of Human Resource Development (HRD), once received, the proposals will be managed by a cross-disciplinary team of NSF Program Directors.

Proposals are solicited to support needs of the marine seismic research communityfor access to acquisition of long-offset and deep-imaging 3D seismic data using a large tuned source. These needs are currently provided by the specialized, seismic research vesselR/VMarcus G. Langseth (Langseth). TheR/V Langsethis owned by the National Science Foundation and operated bytheLamont Doherty Earth Observatory (LDEO) of Columbia University. NSF has determined that it cannot adequately invest in the R/V Langseth or replace the vessel at the end of service life. Therefore, alternative approaches are necessary for providing the marine seismic research capability to support high priority research proposals. R/V Langseth will continue operations through September 2021, or no later than the Fall 2021 regulatory dry-docking, and will be divested.