By Jim Kirk, business development manager, OceanServer Technology, Inc., Massachusetts, USA Today’s AUVs provide a common-sense approach to the global issue of detecting and monitoring underwater unexploded ordnance Unexploded ordnance (UXO), improperly deployed (or dumped) in the world’s oceans and lakes for the past 70-plus years, are becoming a critical concern for the safety of […]

The conditions were completely unsuitable for boattowed survey, but the Iver2 had no problem. AUVs are powerful platforms for marine survey, wielding an arsenal of sensors and giving the ability to get closer to investigated targets reliably, consistently and inexpensively. Magnetometers have always been a particular challenge to mount on AUVs because of their strong […]

In June 2003, the Naval Undersea Warfare Center (NUWC), Keyport WA, surveyed a small waterway within Puget Sound using a SeaQuest gradiometer system. The goal of the survey was to determine the suitability of the site as a location for the U.S. Navy’s new Electro-Magnetic Field Measurement (EMFM) System, consisting of several stationary magnetic and electric field measurement […]

Reprinted from First Break 2000 Written by Fugro LCT Marine magnetometer said to minimise seismic interference risk. Fugro- LCT is claiming a significant breakthrough in the acquisition of marine magnetic data with its GUNMAG marine magnetometer system. The company says that magnetic surveys are most economically conducted in conjunction with seismic acquisition, and for some […]

Brian S. Anderson* (Fugro-LCT), Mark B. Longacre (MBL, Inc.) and Patrick Quist (Fugro-LCT) Summary During a marine seismic survey in 1998, conducted offshore Oman for Triton Oman Inc., a marine magnetometer was used to collect a comparison a new magnetic data set for purposes of comparison with a previously flown high-resolution aeromagnetic survey. Profile analysis […]

By Natasja Verboom, NeSA B.V., Holland; and Malcolm Morgan & Justin Dunning, Chelsea Instruments Ltd, UK By mounting a magnetometer on a Chelsea Instruments’ NuShuttle undulating towed body, Holland ’s Rijkswaterstaat was able to locate buried wrecks that could not be pinpointed by conventional seismic techniques. THE WESTERSCHELDE, in the South West of the Netherlands, […]

Seismic methods get a boost from magnetic sensing equipment By Doug Hrvoic, President and co-founder of Marine Magnetics Corporation The Acquisition of marine magnetic data on seismic exploration vessels has increased dramatically over the last five years. More sensitive magnetometer equipment, combined with new software processing methods are proving that marine magnetic data can enhance […]

J.I. Boyce*, E.G. Reinhardt*, A. Raban† and M.R. Pozza * School of Geography and Geology, McMaster University, Hamilton, ON, Canada, boycej@mcmaster.ca. †Recanati Institute of Maritime Studies, University of Haifa, Mount Carmel, Israel. Ψ Marine Magnetics Corporation,Richmond Hill, ON, Canada, matt@marinemagnetics.com. Abstract The harbour built by King Herod’s engineers at Caesarea represented a major advance in […]