This Day in U.S. Naval History - March 21
1917 - Loretta Walsh becomes first woman Navy petty officer when sworn in as Chief Yeoman
1919 - Navy installs and tests Sperry gyrocompass, in first instance of test of aircraft gyrocompass
1945 - Bureau of Aeronautics initiates rocket-powered surface-to-air guided missile development by awarding contract to Fairchild
(Source: Navy News Service)