An integrated model of multi-sensor characterization technologies for munitions sites

In this paper we describe a successful model of underwater munitions characterization using a suite of integrated technologies. Adapted from mature and extensively utilized land-based munitions assessment techniques, a comprehensive suite of technologies are employed. Project phases and technologies include; diver reconnaissance utilizing former Navy EOD personnel, multi-beam sonar for bathymetry, side scan sonar for seafloor target detection and classification, sub-bottom profiling for sediment characterization, stationary scanning sonar to define high resolution bottom conditions, diver visual searches, full-coverage geophysical mapping via vessel-deployed magnetometer arrays, remote operated vehicle (ROV) deployments for visual and sonar searches and target interrogation, and ROVs equipped with an electromagnetic induction sensor array for target detection and interrogation. Additionally, three integrated underwater positioning systems were used to support accurate collection and integration of datasets within a comprehensive on-site GIS. Application of the methodology at two sites will be discussed. The first site in Seattle Washington comprised a highly cluttered environment around a working pier with water depths between 12 and 21 m. The second site comprises 1170 Ha at a former aerial bombing range at Choctawhatchee Bay near Pensacola, FL with water depths from 1 to 12 m with moderate currents.