Heh, first some wanted to use CQD:

dash dot dash dot | dash dash dot dash | dash dot dot

This was a political process among the notable shipping nations of those times. At first they … provisionally agreed: CQD.

CQD, in Morse code: ▬ • ▬ •      ▬ ▬ • ▬      ▬ • •

Screenshot about CQD.