My grandfather grew up in narrow gauge country, in Penkun, in northern Germany. Penkun was the headquarters of the "Casekow Penkun Oder" 2 foot 6 inch narrow gauge railroad (which I am thinking to cover in a proposed thread about coming to America and the DRGW narrow gauge).
At age 20, in 1904, he was a cadet on the 1878 corvette STOSCH that was used as a training ship by that time. The ship had four coal burning fire tube boilers and a 2,500 hp triple expansion steam engine in addition to a full sailing rig. On long cruises the ship traveled under sail to conserve limited coal supplies. The main armament was 10 5.9 inch guns. I am sure that your navy career did not involve any antique vessels like this. Here is the STOSCH in 1904, when my grandfather was on board and most likely participated in the 1904 cruise from the Baltic to Constantinople (Istanbul).