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Angra is a progressive power metal band from São Paulo, Brazil known for its use of symphonic interludes and regional elements in their songs.
Angra was formed in 1991 by ex-Spitfire duo guitarist Rafael Bittencourt and drummer Marco Antunes, as well as vocalist André Matos, who had recently left Viper, former Firebox bassist Luís Mariutti and guitarist Kiko Loureiro.
Angra would play live in Japan and appeared in The Rock Machine Festival in Spain, the famed Wacken Open Air event in Germany and The ProgPower Festival in Atlanta, Georgia, which was their first visit to the USA.
Angra C, a segment of the bottom of the hull of a very large ship, measuring 14.75 meters in length and having 6 meters at its maximum width, was located below 2 meters of sediment, made of fine silt and sand, at an average depth of 7 meters MSL.
Angra C ballast was in surprisingly small quantity for the size of the ship - estimated at 600 to 800 tons - which points to the hypothetical use of shingle as a primary ballast resource.
Angra C has a double layer of outboard planking, each layer being between 6 and 8 cm thick, making the whole outboard side between 16 and 18 cm thick.