 He also gained insight into how, in the growing German Navy, utilized the experiences of World War I through his posting on a German destroyer in 1931.Since Östberg took up the position of artillery adjutant in the Highest Commander of the Coastal Fleet's staff in 1929, he was able to work effectively for his ideas about the naval artillery and combat service through realistic exercises.He remained in this position until 1934, when he was promoted to lieutenant ("kapten").