Film about GEOSECS, the Geochemical Ocean Sections Study, a global survey of the three-dimensional distribution of chemical, isotopic and radiochemical tracers in the ocean. George Veronis of Yale University speaks about models for ocean layers and circulation in the world ocean, and data gathering by R.V. Melville (SIO) and R.V. Knorr (WHOI). Extensive footage onboard SIO's R.V. Melville shows scientific and shipboard operations during GEOSECS, including recreational activities. Throughout the film, Wallace S. Broecker of Columbia University discusses GEOSECS work on board R.V. Melville. SIO's Harmon Craig discusses GEOSECS data collection and cruise legs. R.V, Melville is shown in port in Tahiti, along with various shore-based activities. Peter G. Brewer of Woods Hole Oceanographic Institution discusses work with Wallace S. Broecker. Arnold Bainbridge, Project Director of the GEOSECS Operations Group, discusses GEOSECS data archiving on magnetic disks packs. Harmon Craig's Isotope Laboratory at SIO is shown processing seawater samples to measure radioisotopes. A "Crossing the Line" ceremony is shown, wherein those who are crossing the Equator for the first time onboard ship, are initiated by King Neptune's Court. R.V. Melville's homecoming to San Diego at SIO's Marine Facilities is shown.
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