 The iceberg was later occupied by the Naval Arctic Research Laboratory, and served as a base of operations for the Navy's arctic research projects such as sea bottom and ocean swell studies, seismographic activities, meteorological studies and other classified projects under the direction of the Department of Defense.Before the era of satellites, the research station on T-3 had been a valuable site for measurements of the atmosphere in the Arctic.Produced by the northern coast of Ellesmere Island, the iceberg T-3 was a very large tabular iceberg.