#inertial_guidance_system__inertial_navigation_system  a system to control a plane or spacecraft; uses inertial forces
  supertype:  #system.instrumentality__unit  instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the unit consists of a motor and a small computer"
  part of:  #autopilot__automatic_pilot__automaticpilot__robot_pilot__robotpilot  a navigational device that automatically keeps ships or planes or spacecraft on a steady course
  part of:  #spacecraft__ballistic_capsule__ballisticcapsule__space_vehicle__spacevehicle  a craft capable of traveling in outer space; technically a satellite around the sun

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