Originally announced as a Jean Simmons vehicle titled "Moon Walk".
The U.S. Navy aircraft carrier shown in the rescue effort at the end of the film is the U.S.S. Coral Sea (CV-43). The only other identifiable U.S. Navy ship noted is the heavy cruiser U.S.S. Helena (CA-75).
The destroyer shown near the beginning of the film, 677, is the USS McDermut.