I'm just wondering in an intellectual curiosity way about this. I put up a 2 meter station with a 6 element, twin stack aerial about 50 feet high. I can make contact with stations in a location about 80 Km away on another island about 80km across an uninterupted stretch of sea. Here's my question, contacts usually start out good and strong with 5-6 S units but sometimes fade out to nothing in less than a minute or two. What could I attribute the fadeouts to? Your thoughts are much appreciated.