The Vityaz Vessel has seen some of the world's most unusual places, e.g. it measured the depth of the Mariana Trench, the deepest part of the world oceans, and changed several names and occupations in its long lifetime. The ship, initially christened the Mars, was built in Germany before the World War II, and was originally intended for freight and passenger carriage. It was converted to military freighting when the war began. The ship was transferred to Great Britain in 1945 (renamed Empire Forth), then to the Soviet Union in 1946, where it was soon reequipped for scientific research. This vessel is among children's favourite exhibits at the World Ocean Museum. They let them ring the ship's bell, and there is even a special button on the museum website that you can push to hear the Vityaz' signature siren.