Model vessels are tested in a huge tank at an Italian ship design centre.
Titles read: 'SETTLING THE Streamlines'.
Various shots of men making models of streamlined vessels in a workshop. The models are tested in a 1,000 feet tank. The motor inside the model drives it along and a massive trolley on the top of the model guides it in a straight line. All kinds of information about the performance of a design can be calculated from these tests and it is used in the future design and construction of ships.