DGC418662 The Titanic\'s propellers in the Thompson Graving Dock of Harland & Wolff, Belfast, Ireland, 1910-11 (b/w photo) (detail of 418661) by English Photographer, (20th century); Private Collection; (add.info.: RMS Titanic; celebrated passenger liner of the White Star Line; completed in March 1912; maiden voyage was April 10, 1912; sank 15 April after hitting an iceberg; graving docks were used in construction of a ship for checking the parts usually under water;); Prismatic Pictures ; English, out of copyright.