#compass__compas  navigational instrument for finding directions
  supertype:  #navigational_instrument  an instrument used for navigating
  subtype:  #gyrocompass__gyrocompas  a compass that does not depend on magnetism but uses a gyroscope instead
  subtype:  #magnetic_compass  compass based on an indicator (as a magnetic needle) that points to the magnetic north
     subtype:  #compass_card__compasscard__mariner'scompas  compass in the form of a card that rotates so that 0 degrees or North points to magnetic north

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