Mike and others, Those signals are NOT fishnet beacons. They are as one here said a version of a navigation system similar to Hyperfix. The reason you hear three "dings" Is that there are three transmitters for each one that transmit in sequence and the electronics aboard ship measures the time of arrival for each pulse providing harbor navigation. How do I know this, I have heard them from the NW here in OR many times and looked them up years ago. There have been at least two discussions about this here on top-band reflector over the years. And as mentioned they NEVER ID. They are also low power. Mike I would suggest you Google Hyperfix. Lee K7TJR OR
-----Original Message----- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Mike Waters Sent: Monday, February 19, 2018 5:09 PM To: topband@contesting.com Subject: Re: Topband: Conditions on 160m for ARRL Contest Google *fishnet beacons *and educate yourself, gentlemen! :-) 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband