G - On 3 November 1906 the Berlin International Wireless Telegraphy
Convention agreement established 500kc/s as the maritime calling and
distress frequency and SOS as the distress signal. To mark this centenary
the Radio Officers' Association will be on air using the call sign GB500KCS
on 3-4 November. QSL via operator's instructions. This special event will
form the launch of the Radio Officers' Association campaign for 500kHz to be
recognised internationally as a 'heritage' frequency. [TNX VA3RJ]
(Source: DX News # 808)