Scientific, [ nautical, surveying, photographic and optical navigation equipment, acoustic, electro-magnetic, weighing, ] measuring, signaling, checking, supervision[,] [ and teaching ] apparatus [ and instruments and other electric apparatus and instruments, to the extent included in this class, and systems comprising the aforementioned apparatus and instruments or consisting of any of them in whole or in part, namely, ] GPS (global positioning system) receivers, gyroscopes, accelerometers, compasses, [ compass systems comprised of compasses, ] computer hardware, gyroscopes, accelerometers, [ magnetic directional sensors; ] Gyroscopes in the nature of gyroscope horizons; Attitude and heading reference systems comprised of computer hardware and directional sensors; Electric apparatus in the nature of computer hardware and software, with inertial sensors for determination of attitude and heading; Heading stabilisation apparatus in the nature of computer hardware, gyroscopes, accelerometers, magnetic directional sensors; Electric apparatus in the nature of computer hardware; Electronic directional sensors for heading determination; [ Laser distance measuring apparatus, Laser scanners; Navigation equipment, namely, compasses, avionic sensor systems in the nature of ] navigation systems for vehicles [ and vessels; Navigation systems comprised of computer hardware, compasses, directional sensors, and position sensors; Leveling apparatus in the nature of water level indicators; Leveling systems comprised of computer hardware, pressure gauges ]; Apparatus with north-seeking gyroscopes, namely, gyroscopes, compasses, accelerometers [, magnetic directional sensors, and computer hardware; Distance measuring apparatus, namely, trigonometric distance measurement apparatus; Trigonometric probes, namely, electric or electronic sensors for determining attitude, heading and distance; Distance measuring apparatus, namely, laser distance measurement apparatus and radio distance measurement apparatus; Computer software, namely, computer operating system programs, computer software programs for control, and application software programs for data processing in all of the above goods and groups of goods; None of the aforementioned goods being for use in the fields of computer-integrated telephony and none of the aforementioned goods being in the nature of electrical installations and electrical machines for welding and brazing, positioning devices for welding and brazing, installations and machines for arc welding and for electrical plasma arc welding and brazing ]