She was christened .
She was launched on 21 April 1939 , sponsored by Mrs. May F. Richardson , wife of Admiral James O. Richardson , Chief of the Bureau of Navigation , and commissioned on 23 October 1939 with Lieutenant John G. Johns in command .
She was christened and launched on 21 April 1939 , sponsored by Mrs. May F. Richardson , wife of Admiral James O. Richardson , Chief of the Bureau of Navigation , and commissioned on 23 October 1939 with Lieutenant John G. Johns in command .