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NRP Adamastor was a cruiser in the Portuguese Navy. She was built in Italy in 1897 using the revenue of a national subscription made after the British ultimatum to Portugal in 1890.
Adamastor played an important role in Portugal′s 5 October 1910 republican revolution, being one of the three rebelling cruisers. During World War I, she was one of two cruisers sent to the vital port of Quelimane in Portuguese East Africa in 1916. The presence of the cruisers was a decisive factor in preventing German forces from continuing their advance on Quelimane after the German victory at the Battle of Namakura.
On 5 October 1934, Adamastor ran aground at Bolama, Portuguese Guinea. She was refloated on 7 October 1929.
In 1934, Adamastor was decommissioned and sold to the Portuguese merchant marine.
- ^ "Casualty reports". The Times (45327). London. 7 October 1929. col E, p. 21.
- ^ "Casualty reports". The Times (45328). London. 8 October 1929. col G, p. 26.
- J.C. Pereira ed., Dicionário Ilustrado da História de Portugal (Lisbon: Alfa, 1985) (Portuguese)