Description: Underwater acoustic positioning systems comprising of hardware and software based on chirp and FM modulation techniques used for acoustic positioning of underwater vehicles and structures; underwater acoustic positioning systems comprising of hardware and software based on fiber optic gyroscopes, marine magnetometers and chirp and FM modulation techniques used for inspection, rescue, and salvage of submerged objects; underwater acoustic positioning systems comprising of hardware and software based on chirp and FM modulation techniques used for oceanographic and meteorological localization and positioning; underwater acoustic positioning systems comprising of hardware and software based on chirp and FM modulation techniques used for measuring distances underwater; underwater acoustic positioning systems comprising of hardware and software based on chirp and FM modulation techniques used for navigating nautical vessels; submarine acoustic systems comprising of hardware and software used for positioning of underwater structures and subsea vehicles, namely remote operated vehicles (ROVs), automated underwater vehicles (AUVs), unmanned underwater vehicles (UUVs), and towfishes; underwater acoustic transmitters; directional compasses, underwater directional compasses; computer software for setting acoustical transponders; software for displaying status and localization based on underwater acoustic positioning systems; beacon buoys for sending acoustical signals in water; electro-dynamic devices for remote-control of underwater acoustical signals; [ Nautical logs ]; [ Scientific research and technological consultation in the fields of underwater acoustics; scientific research and technological consultation in the fields of locating undersea resources, namely, petroleum, gas, and polymetallic nodules; industrial analysis and research services, namely, for navigation, for positioning, and for metrology services; chemical analysis for others; analysis for operating oil fields; professional consulting in the fields of underwater acoustic; consulting on the protection of the environment; design and development of computers and software for others; testing of materials for others; nautical consultation, namely, positioning expertise consisting in the determination of the position or the direction in which an object, mineral, rock, soil, is placed or is pointing, especially in relation to other objects, minerals, rocks, soils, and places under water for engineering works and oilfields; nautical consultation, namely, positioning expertise consisting in the determination of the position or the direction in which an object, mineral, rock, soil, is placed or is pointing, especially in relation to other objects, minerals, rocks, soils, and places underwater for prospecting geological expertise and research ]
