Scientific, nautical, surveying, photographic, cinematographic, optical, weighting, measuring, signaling, checking, life-saving, and teaching apparatus and instruments, namely, electronic flight data recorders, laser detectors for helicopters for use in detecting obstacles, laser object detectors for use on aerial vehicles; Laser detectors for detecting, tracking and warning of hostile laser sources aiming at airborne platforms, namely, for detecting laser range finders, laser target designat...