The Radio Corporation of America wireless stations on the Point Reyes Peninsula were known as the "Wireless Giant of the Pacific," and under the leadership of long-time chairman David Sarnoff they used station locations and cutting-edge wireless technology to transmit a signal recognized by shipboard operators throughout the Pacific as station KPH. Station KET operated point-to-point services at this site beginning in 1931 through receivers affectionately known as "Green Giants." In 1946, ship-to-shore Morse station KPH relocated here and continued commercial operations until 1998. KPH had received one of the first standard three-letter call signs in the United States in 1904 when it was located at the Palace Hotel in San Francisco, and in 1912 it was acquired by the Marconi Wireless Telegraph Company of America. Two years later, Guglielmo Marconi completed a new long-wave receiving station on Tomales Bay as well as a state-of-the-art transmitting station in Bolinas. That same year, the stations made the first wireless transmission across the Pacific, opening instant communications to Hawaii for the first time and benefiting business and news. Following World War I, the newly formed RCA acquired the stations. After the station closed in 1998 because of technological advances in ship-to-shore communications, the National Park Service acquired the Point Reyes and Bolinas radio sites. Members of the Maritime Radio Historical Society then partnered with Point Reyes National Seashore, and now, operating under the call letters KSM and licensed for Morse transmission, they run the station and a docent program while working with the park to preserve the equipment, archives, station history, and the legacy of its operators and to share that past with the public.