The taut wire buoy tower with the wing tank for buoyancy can be seen here from the R/V Argo during the Swan Song Expedition (1961). This expedition explored the North Pacific at the equator and Eastern Tropical Pacific on the research ship Argo. The expedition collected large water samples for analysis, studied the Cromwell Current (Pacific Equatorial Undercurrent), and undertook a limited biological program for the Inter-American Tropical Tuna Commission.1961.
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