Keywords: Yorktown trials.jpg en The U S Navy aircraft carrier USS Yorktown CV-5 making 17 5 knots astern during preliminary standardization trials run 41 off Rockland Maine USA 12-21 July 1937 She is pushing up a handsome moustache stern wave Carriers of this class were required to make good speed astern to allow landing planes over the bow and launching over the stern if necessary Photograph http //www history navy mil/photos/images/n10000/n17422c htm 19-N-17422 from the U S Navy Bureau of Ships Collection in the U S National Archives USN 1937-07 PD-USGov-Military-Navy USS Yorktown CV-5 Sea Trials |