CHARACTERISATION OF SHIP MAGNETIC SIGNATURES USING OVERRUN MAGNETIC RANGING IN THE EQUATORIAL REGION

Received: 14 Sep 2020, Revised: 19 Sep 2020, Accepted: 22 Oct 2020, Available online: 25 Dec 2020, Version of Record: 25 Dec 2020

Abdul Rauf Abdul Manap1*, Hasril Nain2, Mahdi Che Isa2, Mohd Hambali Anuar1, Mohd Hazri
Rahmat3, Roslan Slamatt1 & Muhammad Syauqat Abd Khalid2
1Degaussing Centre
2Maritime Technology Division
3Research, Innovation and Strategic Direction Unit
Science & Technology Research Institute for Defence (STRIDE), Ministry of Defence, Malaysia
*Email: rauf.manap@stride.gov.my

Abstract


Malaysia is located in the equatorial region, which experiences the largest horizontal component of the Earth's magnetic field as compared to other regions. The presence of any ferromagnetic materials will alter the existing magnetic strength distribution in surrounding region. In this study, overrun magnetic ranging procedure was conducted on six ferromagnetic ships of different classes in order to characterise their magnetic signatures. The operating histories of these ships exceed 10 years. The results from the study showed that two different types of ship magnetic signatures were identified. The first type is a mixture of longitudinal and vertical components, while the second type is a vertical component of magnetic signature. Based on the results, it can be summarised that the history of where the ship is exposed to the Earth's magnetic field along operation plays a major role in contributing to its magnetic signature characteristics.
Keywords: Equatorial region; Earth’s magnetic field; ship magnetic signature; overrun magnetic ranging; ferromagnetic ships.



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“Authors state no conflict of interest”


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