In addition to the extra effort required to distinguish an UXO from the more general TOI (Target of Interest), there is an additional problem faced when the seafloor is littered with a multitude of “junk”: the proximity results in, for electromagnetic sensors and magnetometers, increased response, which is difficult to subtract from the sought-after UXO response. For acoustic systems, it is even worse: the “junk” reflects acoustic energy also, resulting in adding energy to the signal under investigation from unexpected directions and other objects.

Subtopics:
Acoustic Response of UXOs

All munitions have some version of cylindrical symmetry, so the plots display a behavior due to that symmetry. Learn More...

Target Identification

Identification currently is limited to making the call that the object is a target of interest, an indication of its size (small, large) and using details of the scattered energy response to confirm it is anthropogenic, based on symmetry properties. Learn More...