— · — · — — · — — · · is CQD. K+ to the first person to tell us what it is, what replaced it and when.
Yep you are right. SOS was used by the Germans in 1905, but the Titanic sinking in 1912 used both CQD and SOS and i believe SOS was used after due to the fact it was quicker and easier to send.
Possibly the best known piece of Morse Code & it was written nearly 100 years before the adoption of Morse Code.
Not to be confused with 'dum de dum de dum de dum' https://www.youtube.com/watch?v=XeIEovjOVdI&feature=youtube_gdata_player
Definitely 'Duh duh duh duuuuuhhhhhh' http://en.wikipedia.org/wiki/File:Ludwig_van_Beethoven_-_symphony_no._5_in_c_minor,_op._67_-_i._allegro_con_brio.ogg