| Beschreibung: | 5673611 (9003491) Ein rotierender Sendemast bei Inchkeith, Firth of Forth, Schottland. Der Mast sendet Kurzwellen aus, durch die Schiffe, die diese Wellen empfangen, ihre Peilung und Position zum nahegelegenen Leuchtturm erfahren können. Marconi Wireless Telegraph Co. Ltd., 01.01.1925. Marconi rotating beam transmitter at Inchkeith, Firth of Forth, Scotland.
This revolving wirelss beam apparatus projects a horizontal ray of short wireless waves which sweeps round the horizon in about 2 minutes sending out distinctive signals indicating the direction in which the beam is pointing at the moment . A vessel desiring to know its hearing in relation to the lighthouse only requires to note on a short wave received at each revolution of the beam . This indicates absolutely the bearing of the lighthouse because only on that definite bearing can that distinctive signal be transmitted by the apparatus . Marconi Wireless Co Ltd . 1 January 1925. [SPERRVERMERKE BEACHTEN | PLEASE CHECK RESTRICTIONS! Nutzung nur mit Genehmigung und gegen Honorar, Beleg, Namensnennung und zu unseren AGB. Nur zur redaktionellen Verwendung. Honorare an: KEYSTONE Pressedienst, www.keypix.de] |
