1882 The first expansion of the Romanian Danube Flotilla took place in 1882. Two armored torpedo boats,
Șoimul and
Vulturul, were purchased from
Yarrow in
Britain, where
Rândunica was also built seven years prior. These boats had a displacement of 12 tons, measuring 19 meters in length, with a beam of 2.5 meters and a draught of 1 meter. Power plant consisted of one 150
hp steam engine generating a top speed of 16.5 knots. Each boat had a crew of 8 and was armed with a single
spar torpedo. Aside from increased dimensions and greater speed, the two boats were also fitted with bulletproof armour. These two boats were followed by three
Rahova-class gunboats, also built in Britain at
Thames Iron Works. With a displacement of 45 tons and a top speed of 8.5 knots, these small gunboats were each armed with one
37 mm gun and one machine gun. Also commissioned in 1882 was the 104-ton guard ship
Alexandru cel Bun. The latter was used as a
minelayer during the First World War. She measured 23 meters in length, with a beam of 4.6 meters and a draught of 1.5 meters. She was powered by 100
hp steam machinery, giving her a top speed of 9 knots, and could carry 12 tons of coal. Her crew amounted to 20 and her armament consisted of two 37 mm guns and two machine guns.
1888 The second expansion of the Flotilla took place in 1888, when three 116-ton
Bistrița-class gunboats were commissioned. These vessels measured 30.5 meters in length, with a beam of 4.1 meters and a draught of 1.7 meters. They were also built by Thames Iron Works and each was armed with one 57 mm gun and one 37 mm gun. Crewed by 30 men each, they had a top speed of 13 knots generated by 380 hp steam propulsion, carrying a maximum of 12 tons of coal.
1893-1894 Two consecutive expansions followed in the 1890s. In 1893, three 95-ton guard ships of unknown origin were commissioned. Each was armed with one 57 mm gun and two 37 mm guns, having a top speed of 13.5 knots. A further expansion followed in 1894, when four German-made torpedo boats were commissioned. Known as the
Vedea-class, they were built at
Schichau-Werke, having a displacement of 30 tons, measuring 20 meters in length, with a beam of 3 meters and a draught of 1.5 meters. Each boat had a crew of 16 and a top speed of 10 knots. Armament consisted of one 37 mm Hotchkiss revolving gun, one machine gun and two spar torpedoes.
1906-1908 This was by far the greatest pre-war expansion of the Romanian Danube Flotilla. Between 1906 and 1907, a class of 8 British-built
torpedo gunboats was commissioned. These
50-ton vessels, built by Thames Iron Works, were well-armed for their size: in addition to one 47 mm naval gun and one 6.5 mm machine gun, each boat also carried 4 torpedoes: two on spars in front of the vessel and two more amidships in torpedo dropping gear (carriages). They measured 30 meters in length, with a beam of 4 meters and a draught of less than 1 meter. These boats were also armored, having bulletproof sides and deck. They were powered by two compound engines powering two shafts, resulting in an output of 550 hp and a top speed of 18 knots. They could carry up to 7.6 tons of oil and had a crew of up to 20. Between 1907 and 1908, four large river monitors were commissioned (). They were built in sections at
STT in
Austria-Hungary. Their sections were then transported to the
Galați shipyard in
Romania, where they were assembled and launched. Standard displacement amounted to 680 tons, increasing to 750 tons at full load. Each monitor measured 63.5 meters in length, with a beam of 10.3 meters and a draught of 1.6 meters. Power plant consisted of two engines and two
Yarrow boilers powering two shafts, generating a total of 1,800
hp which resulted in a top speed of 13 knots. The monitors had a crew of 110 and a range of 1,500 nautical miles at a speed of 9.7 knots. Armor thickness reached 70–75 mm on the belt, deck, turrets and conning tower. Armament during
World War I consisted of three 120 mm
Škoda naval guns in independent armored turrets, one 120 mm Škoda naval howitzer, four 47 mm Škoda naval guns and two 6.5 mm Romanian-made
Maxim machine guns. The first campaign of the
Brătianu monitors was the
Second Balkan War in 1913. During the war, the ships protected the
Cernavodă Bridge and aided in the
crossing of the Danube. The monitors also ensured the protection of the
pontoon bridges and the transport ships during the campaign. ==World War I==