It’s too late, I should be in bed, but once again I’m reading up on low frequency radio communication, another of those oddball interests you pick up when you read too much. I blame tuning around with the SDR-IQ this evening, where I found that a number of DGPS beacons were easily heard down around 314Khz. Trying to find more information lead me to W3EEE’s excellent LF website, which makes me think that perhaps I should try receiving NAVTEX beacons sometime. Good stuff.