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T-3 Ice Island One Hour Navigation: May 14, 1962 to September 15, 1974


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Ruppel, C.D., Hutchinson, D.R., Lachenbruch, A.H., and Hall, J.K., 2019, Thermal data and navigation for T-3 (Fletcher's) Ice Island Arctic Ocean heat flow studies, 1963-73 (ver. 1.1, December 2022): U.S. Geological Survey data release,


The T-3 (Fletcher's) Ice Island in the Arctic Ocean was the site of a scientific research station re-established by the Naval Arctic Research Laboratory starting in 1962. Lamont Geological Observatory (LGO; now Lamont-Doherty Earth Observatory) and the U.S. Geological Survey, along with other organizations, ran research laboratories on the island during the 1960s and early 1970s as the island drifted in the Amerasian Basin. LGO compiled navigational data, measured gravity and magnetic data, and conducted seismic surveys to image the seafloor. This data release provides the edited LGO-compiled 1 hour navigational data for T-3 from May 1962 until September 1974, along with gravity and magnetic data and calculated anomalies on the same [...]


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“Data in XLSX format.”
8.06 MB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
“T-3 Ice Island navigation track labelled with a selection of dates.”
thumbnail 5.27 MB image/jpeg
“Data in CSV format.”
7.65 MB text/csv


To provide 1-hour navigational data and some gravity anomaly and magnetic anomaly data for the T-3 ice island circuit of the Amerasian Basin from 1962 to 1974.

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