Any German submarine of the First or Second World War, or any Austro-Hungarian submarine of the First World War.
Nickname given to the General Electric Universal Series diesel-electric locomotives.
A narrow, utility cart with tall handles on both ends that is used to carry loads of retail products to be sold, so named because its shape is roughly that of a capital U.
A military (naval) vessel designed for operation on the marine surface, as distinguished from a submarine or other types of vessels. Aircraft carriers are also generally excluded.