The Integrated Crate Interrogation System is comprised of a Box Segmented Gamma Scanner (BSGS) providing high resolution gamma spectroscopy, and a Box Neutron Assay System (BNAS) providing passive neutron counting capability, each mounted in its own separate ISO container. Gamma and neutron assay results are combined to provide an integrated result using the NDA 2000™ software multi-modality. The system can handle crates in sizes up to and including the Standard Large Box-2 (SLB-2) which has approximate inner dimensions of 2.6 m x 1.6 m x 1.7 m (length x breadth x height).  The system can also be fully calibrated for smaller containers if desired.