sentences:  "Velocity" was laid down on 21 July 1941 at Chickasaw, Alabama, by the Gulf Shipbuilding Co.; launched on 15 April 1942; sponsored by Mrs. K. B.Hover, the wife of the shipbuilder's destroyer hull foreman; and commissioned on 4 April 1943, Lt. Comdr.Joseph L. Bull, Jr., USNR, in command.