Development and Testing of a New Version of MBUD for Cued Classification of Marine UXO

There continues to be a need for an electromagnetic induction (EMI) system that can characterize unexploded ordnance (UXO) in the marine environment. There are many areas in the millions of acres that host underwater UXO. The US Army Corps of Engineers has identified 400 underwater formerly used defense sites. These sites all have munitions or UXO in less than 40m of water. A size-depth plot typical for these UXO from Di-Marco et al. (2010) was used as a design guide for the first MBUD system and is reproduced here as Figure 1. A compilation of polarizability calculations from a variety of targets for BUD and MBUD is shown by the dashed line in Figure 1. This line indicates that the MBUD system can effectively classify most targets to a depth of about 1.2 m.