Simple QRP projects, 10m, 6m, WSPR beaconing, LF/MF, sub-9kHz, nanowaves and other random stuff
500 kHz was replaced in 1999 by the Global Maritime Distress and Safety System (GMDSS), which uses a combination of automated terrestrial and satellite communications.
Post a Comment
It was cold and bright here today. The photo was taken by my XYL on our way to Cambridge this afternoon.