USC&GS Pioneer was a survey ship that served in the United States Coast and Geodetic Survey from 1922 to 1941. She was the first ship of the Coast and Geodetic Survey to bear the name.
Pioneer
The first USC&GS Discoverer was a survey ship that served in the United States Coast and Geodetic Survey from 1922 to 1941.
USC&GS Discoverer in Territory of Alaska waters.