System for emitting a controlled magnetic field, a mine protection system and a mine countermeasure ship comprising the same, and a method for storing an electromagnet

摘要

An electromagnet can be used to provide a controlled magnetic field, for example for the purpose of minesweeping. The electromagnet is constructed of a material which has a Curie temperature, such that the electromagnet can be stored at a temperature above the Curie temperature, but deployed below the Curie temperature in use.