A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Richard Easton
Date: 2017 Nov 28, 14:30 -0800
Frank, you make valid points but the decision to shut down Loran was stupid and was protested at the time.
Here's a 2015 article on e-Loran (part of Richard Langley's Innovation Insights). http://gpsworld.com/innovation-enhanced-loran/.
Here's a recent article on GPS spoofing http://gpsworld.com/spoofing-in-the-black-sea-what-really-happened/. I think it is a threat today.