Magnetic source parameters of MR OFFSHORE measured during trial MONGOOSE 07


  1. Nelson, J.B.
  2. Richards, T.C.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Sea mines can be triggered by the magnetic field from a naval vessel, and thus monitoring the magnetic state of a naval vessel is critical. The vessel’s signature is usually measured by sailing it over an electromagnetic (EM) range equipped with bottom-mounted magnetic sensors. If the magnetic signature is too large, then some type of treatment (degaussing, de-perming, etc) is done to reduce it. Range facilities are often far from the vessel’s operating area and require considerable transit time to reach them. “Forward EM ranging” is the term used for making EM signature measurements with portable sensors while the vessel is in the operating area. One concept for locating and identifying sea mines is to use a combined sonar/magnetic detection system. The Naval Surface Warfare Center in Panama City, Florida (NSWC-PC) has developed such a system on a REMUS autonomous underwater vehicle (AUV). Because the REMUS magnetic sensor is also capable of measuring a naval vessel’s signature, and its navigation system is capable of measuring the AUV’s position and orientation, then it should be possible to use their REMUS for forward EM ranging. DRDC Atlantic and NSWC-PC measured the magnetic signature of the vessel MR OFFSHORE using the laser scalar magnetic gradiometer-equipped REMUS underwater vehicle during trial MONGOOSE 07 in June 2007. The magnetic signatures were measured on a number of ship and REMUS headings. These data have been analysed to yield the permanent and i

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Report Number
DRDC-ATLANTIC-TM-2007-223 — Technical Memorandum
Date of publication
01 Sep 2007
Number of Pages

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