Wireless Waves Cross Sea: SS Kaiser Wilhelm der Grosse Makes History

The German liner SS Kaiser Wilhelm der Grosse became one of the first ships to use wireless telegraphy for ship-to-shore communication on March 7, 1900, transmitting signals to a station at the Needles on the Isle of Wight from roughly 30 miles offshore. Guglielmo Marconi's company had installed the equipment, which used spark-gap transmitters to send Morse code through the air. The successful transmission demonstrated that ships at sea could communicate with land without physical wires, ending millennia of maritime isolation. Before wireless, a vessel that left port was unreachable until it arrived at its destination or encountered another ship. Distress signals could not be sent; storms, collisions, and fires at sea were silent emergencies. The Kaiser Wilhelm demonstration helped convince shipping lines that wireless equipment was worth the investment. Within two years, Marconi's equipment was standard on major ocean liners, and in 1912, the Titanic's wireless operators transmitted the distress signals that guided rescue ships to survivors.