| 摘要 |
<p>A device for locating a submerged submarine includes a magnetic device supplying a magnetic field for adherence of the device against the external structure of a submarine, the magnetic device comprising at least two magnets (2, 3) located adjacent to each other and having co-acting magnetic fields, and a magnetically operated switching means (4) within the magnetic field provided by the magnets, the switching means being responsive to a change in the magnetic field due to the introduction of a metal mass into the field to actuate a source (11) of an acoustic signal.</p> |
