But a year earlier, the Engineering School was no longer subordinate to the War Ministry and was renamed Marine Engineering School. Practical parts of the training were conducted in the arsenals, on board ships, in electrical engineering classrooms, in telephone exchanges, in radio transmitter rooms, in power plants, in railway depots and workshops, on board the destroyers, in Bozhurishte, in the mines in Pernik and many other places. For a time the school was subordinate to the Ministry of Industry and Labour, and later – to the Ministry of Railways, Communications and Ports. Graduates could continue their studies in all tertiary technical institutions. Practically, immediately after the end of the First World War, the Steersman School (unit), part of the Maritime Special Schools, was separated and transformed into Fisherman School, which existed until April 1, 1934. In 1929, the status of the Marine Engineering School was set out in a special law and it was renamed Maritime School. Two years later a Seagoing Department was created, which was tasked with training watch officers for the merchant marine. The officers of the Maritime Police Service were trained partly in the Maritime School in Varna and graduated from the Military School in Sofia. The college in Sofia, which later became a tertiary institution in 1923, issued their diplomas insofar as an officer needs to have college education and under the terms of the Treaty of Neuilly-sur-Seine Bulgaria was allowed to have only one military college. In 1930, the Maritime Special Schools were reorganized and three new units were created: Electrical Engineering, Mechanical and Motor. Their programs (i.e. curricula) were supplemented and improved. The Engineering School and Miner and Stoker School, later renamed Maritime Special Schools, were the first educational institutions in the country which not only trained hundreds of qualified specialists for the needs of the navy and the emerging Bulgarian industry. They became the backbone of the middle technical level personnel in the country. In 1934, the Marine Engineering School was moved into the buildings of the already closed Fisherman School on the island of St. Cyril near the town of Sozopol. In 1940, the school returned to Varna in the large imposing building on Stefan Karadzha Street. That same year, its graduates participated in the assault operation in Balchik during the return of Southern Dobruja in the borders of the Kingdom of Bulgaria. In 1942, with a royal decree, the