Ask any sailor who lived in close proximity to a ships "fog-horn" and he will say that "that is the worst". Every 2 minutes a long blast would be sounded. This could go on for days, but generally it only seemed to happen when I was trying to get some zeds in. With some of the mechanical horns it wasn't so much the "horn", but the socking great "clunk" as the lid dropped. Apparently the old "Queens" had horns that could be heard for 30 miles if the conditions were right. Must have miffed some of the wealthy passengers just under the dog kennels! BY.