1st radio telegraph message from Netherlands to Dutch East Indies

On May 5, 1923, the first successful radio telegraph message was transmitted from the Netherlands to the Dutch East Indies (now Indonesia). This pioneering long-distance communication was facilitated by the advanced shortwave radio technology of the time, which enabled signals to travel vast distances via ionospheric reflection. The achievement marked a significant milestone in global communication, demonstrating the ability to maintain reliable contact between Europe and Southeast Asia without relying on undersea cables. This event not only enhanced commercial and governmental communication but also underscored the potential of radio telegraphy to connect distant parts of the world, laying the groundwork for future advancements in international radio communication.