Scientific and nautical apparatus and instruments, namely, underwater acoustic positioning systems comprised of an acoustic transceiver, acoustic transponders and recorded or downloadable positioning software used for positioning, tracking and navigation of underwater targets, surveying apparatus and instruments, optical apparatus and instruments, namely, optical cables, optical couplers, integrated optical circuit, optical fiber, optical gyroscope, fiber-optic gyroscope, optical sensors, fib...

Underwater acoustic positioning systems comprised of an acoustic transceiver, acoustic transponders and positioning software used for positioning, tracking and navigation of underwater targets; inertial navigation systems and inertial positioning systems; positioning systems for submarine navigation, monitoring and positioning, namely, GPS navigation and tracking devices, gyrocompasses, navigation apparatus for boats, and oceanographic acoustic releases for submarine; submarine signaling appa...