More than half of all Coast and Geodetic Survey Corps officers had served as officers on the American Expeditionary Force by 1918 .
Before World War I ended in November 1918 , over half of all Coast and Geodetic Survey Corps officers had served in the U.S. Army , U.S. Navy , or United States Marine Corps , performing duty as artillery orienteering officers , as minelaying officers in the North Sea ( where they were involved in the laying of the North Sea Mine Barrage ) , as navigators aboard troop transports , as intelligence officers , and as officers on the staff of American Expeditionary Force commanding officer General John `` Black Jack '' Pershing .
NOAA Commissioned Officer Corps