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The first was the Nordenfelt I, a 56 tonne, 19.5 metre long vessel similar to Garret's ill-fated Resurgam (1879), with a range of 240 kilometres and armed with a single torpedo and a 25.4 mm machine gun. It was manufactured by Bolinders in Stockholm in 1884-1885. Like the Resurgam, it operated on the surface using a 100 HP steam engine with a maximum speed of 9 kn, then it shut down its engine to dive. She was purchased by the Greek Government and was delivered to Salamis Naval Base in 1886. Following the acceptance tests, she was never used again by the Hellenic Navy and was scrapped in 1901.
Nordenfelt then built the Nordenfelt II (Abdülhamid) in 1886 and Nordenfelt III (Abdülmecid) in 1887, a pair of 30 metre long submarines with twin torpedo tubes, for the Ottoman Navy. Abdülhamid became the first submarine in history to fire a torpedo while submerged under water.
Nordenfelt's efforts culminated in 1887 with the Nordenfelt IV built by Naval Construction and Armaments Co of Barrow, which had twin motors (working on one propellor) and twin torpedoes. It was sold to the Russians, but proved unstable and ran aground off Jutland; when the Russians refused to pay for it, it was scrapped.
The submarines Abdülhamid and Abdülmecid were found by Germany in Istanbul in 1914. The submarines were briefly considered for use in harbour defence but it was found that their hulls were too badly corroded.