 In February 1945, Ramirez de Arellano worked with submarine relief crews in Submarine Division 202 and he served as Commander of Submarine Division 16.In May 1946, Ramirez de Arellano was named Commanding Officer of Submarine Base, Saint Thomas, U.S. Virgin Islands.With the exception of his other two ship commands, the (1952–1954) and of the (1954–1955), Ramirez de Arellano held various administrative and teaching positions — among them Assistant to War Plans Officer, Caribbean Sea Frontier, 10th Naval District (1947–1949) and in the Department of Languages, U.S/ Naval Academy (1949–1952).