Magnetic Anamoly-Based Detection of a Submarine

Seawater provides a natural hideout for seaborne vehicles and weapons. So the detection of seaborne objects/vehicles has been an area of strategic interest. Earth's magnetic field is a global phenomenon that travels in a straight path deviating only from the presence of permeable objects. This deviation from the straight path can be sensed passively by a magnetic sensor. Magnetic anomaly detection (MAD) is a technology used to detect submarines based on the principle that a moving magnetic object will disturb the Earth's magnetic field. This article discusses the basics of magnetic anomaly detection for submerged objects, including how it works, its history, and recent advances in technology. A magnetic signature of the submarine and aircraft's interference field has been created for exploring passive detection by sensors to demonstrate the MAD process. Work is simulated in COMSOL Multiphysics and results are added. The validation of this work will be done in the future by hardware implementation of MAD.