The Marine Radio Historical Society (MRHS) will hold its annual “Night of Nights” event, in which historic maritime CW stations such as KPH and WLO return to the air for a few hours on July 13 UTC (July 12 in US time zones) along with some US Coast Guard stations. The event commemorates the days when coast and shipboard station operators transmitted their message traffic via Morse code.

A pair of Amateur Radio stations — K6KPH and W4WLO — will be active on CW as well, and QSL cards will be sent to those who copy the text of the maritime stations’ CW signals or work the ham stations.

The maritime stations shut down in the late 1990s, but the MRHS has resurrected KPH and attempts to preserve the history of the era.