ICx Technologies of Billerica, Massachusetts, has developed a new explosives detector under the Homeland Security Advanced Projects Research Agency Rapid Technology Application Program. The highly sensitive and lightweight Fido Scout can detect explosives under water. It is an enhanced version of the existing Fido-XT handheld explosives detector. New features include a four-button interface for quick operation and a rugged exterior for use in maritime environments, including submersion. The unit detects explosives using proprietary amplifying fluorescence polymers to detect trace levels of explosive materials at a level comparable to that achieved by highly trained canines.