DULUTH — Have you ever noticed that not all ships entering, or leaving, the Duluth Harbor use the same horn signal? I'll confess that I hadn't. Fortunately, the News Tribune has a reader with ...

the captain would use a horn equivalent to the Morse code Q to warn other ships to yield the right-of-way to the queen. When trains started using whistles, they adopted the signal for Q when ...

It was a foghorn, of course, more than likely from a ship's horn. But it may or may not have ... the lighthouse in the dense fog using audio signals. Like many I used to hear the breakwater ...

said many people looked forward to the area's cruise ship season. She said: "Some have a musical horn and a funky tune. It is a signal to say 'hello' or 'goodbye'." The port authority said it ...