Secret Signal Code of the Justice League



The Secret Signal Code of the Justice League was a method of communication that was similar to Morse code and the Bat-code, but still distinctly different. Only members of the Justice League of America were familiar with the code, so that anyone monitoring it would not hear classified information.

Colonel Wilcox and Doctor Curum called in Green Arrow to listen to the code on their radio, as they were unable to identify it, and it turned out to be a message from Superman regarding the location of Doctor Gulliver.