"Teledyne TSS Orion inertial navigation system"@en . . "SDN:L22::TOOL0900" . "An Inertial Navigation System (INS) used for hydrographic survey, offshore construction and ROV operations. The system comprises three Ring Laser Gyros (RLG) and three accelerometers. A surface and sub-sea variant is available. Heading accuracy: 0.1 degrees RMS secant latitude (with GPS antenna aiding). Pitch and roll dynamic accuracy: 0.01 degrees. Heave accuracy: 5cm or 5% whichever is greater."@en . .