the 3 maritime radiobeacons IJmuiden *YM, Hoek van Holland *HH, and Eierland *ER formed a network on their working frequency, where each of the stations was transmitting the callsign and a dash for 1 minute each, giving the ship's radio operator good bearings to several fixed points in short time. A special item of this network was the use of a defined pitch of the dash: here it was 1052 Hz to differentiate from other signals. With the use of GPS (and DGPS) signals this service became obsolete.
no recordings available
a fine QSL-letter (Rudy van Dalen, 1982)
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Callsigns:
ER
Frequencies Morse Telegraphy:
294.2
301
.