Boat e.g. naval vessel, magnetic signature measuring device for controlling e.g. acoustic indiscretion, has measurement sensor measuring magnetic signature of boat and constituted by three axle magnetometer, and signal acquisition unit

摘要

The device has a self-propelled movable unit constituted by an autonomous sub-marine engine (1). A measurement sensor (2) measuring a magnetic signature of a boat is constituted by a three axle magnetometer (5). The sensor is arranged inside a rigid sheath (3) fixed outside shell of the engine by a tube (4). The sheath has interior connected to interior of the engine that has a helix (12) driven by a motor. A signal acquisition unit records signal from the magnetometer and a hydrophone (8), where the hydrophone determines relative position of the engine with respect to the boat. An independent claim is also included for a method for measuring a magnetic signature of a boat using a magnetic signature measuring device.