Abstract
In a conductive water moving through a pipe at right angles to a magnetic field, an electromotive force is induced. This effect can be used to measure the relative speed between the pipe and water by maintaining a known magnetic field. The signal obtained is proportional to the speed of a ship, but very small, therefore it must be amplified sufficiently to actuate an indicator. In this paper, the results of the fundamental study of the apparatus to measure the speed of a ship by appling this principle is described.
