He was sent to London in 1905, and after spending a year and a half in Harrow School, he moved to Germany to join the Royal Prussian Military Preparatory College at Potsdam according to the wish of his father, then continued his military education at the Imperial Military Academy at Groß–Lichterfelde in Berlin. Following the wish of his half-brother, King Vajiravudh, he then entered the Imperial German Naval Academy at Flensburg-Mürwik. While there, he won a competition in submarine design. He was commissioned Lieutenant in both the Imperial German Navy and the Royal Thai Navy in 1912.