RMS Titanic and make a port of call on the northern coast of France, usually at Cherbourg. This allowed British ships to pick up clientele from continental Europe before recrossing the channel and picking up passengers at Queenstown. The "Southampton-Cherbourg-New York run" would become so popular that most British ocean liners began using the port after World War I. Out of respect for Liverpool, ships continued to be registered there until the early 1960s. "Queen Elizabeth 2" was one of the first ships registered in Southampton when introduced into service by Cunard in 1969. "Titanic"'s maiden voyage was intended to be the
CQ (call) the 1912 London International Radiotelegraph Convention, and is still used. A variant of the CQ call, "CQD", was the first code used as a distress signal. It was proposed by the Marconi Company and adopted in 1904, but was replaced between 1906 and 1908 by the SOS code. When the "Titanic" sank in 1912, it initially transmitted the distress call ""CQD DE MGY" (with ""MGY" being the ship's call sign). "Titanic"'s radio operator subsequently alternated between SOS and CQD calls afterwards. In amateur radio usage, a CQ call can be qualified by appending more letters, as in "CQ DX" (meaning