Free Republic

Radio Buffs Lobby to Make Historic 500 kHz a 'Memorial Frequency'For almost a century, 500 kHz was a lifeline for ships worldwide. Better known as 500 kilocycles, it was the spectrum reserved for ships and the shore stations that communicated with them in Morse Code (sometimes referred to as CW, for continuous wave). If you're a real radio old-timer, you might refer to the frequency as 600 meters. "To ensure that SOS calls were always heard, all ship and shore stations were required to monitor 500 kHz at all times," said Richard Dillman, secretary and chief CW operator of the...

Probe Into Cuba's Possible 'Sunken City' Advances Fri Mar 29, 6:20 PM ET By Andrew Cawthorne HAVANA (Reuters) - Scientific investigators said on Friday they hope to better determine later this year if an unusual rock formation deep off Cuba's coast could be a sunken city from a previously unknown ancient civilization. "These are extremely peculiar structures ... They have captured all our imagination," Cuban geologist Manuel Iturralde said at a conference after a week on a boat over the site. "If I had to explain this geologically, I would have a hard time," he told reporters later, saying examination...