#itinerary__path__route  an established line of travel or access
  supertype:  line.location  a spatial location defined by a real or imaginary unidimensional extent
  subtype:  feeder_line  a branching path off of a main transportation line (especially an airline)
  subtype:  main_line  the principal route of a transportation system
  subtype:  data_track__track  (computer science) one of the circular magnetic paths on a magnetic disk that serve as a guide for writing and reading data
  subtype:  air_lane__airlane__flight_path__airway  a designated route followed by airplanes in flying from one airport to another
     subtype:  approach_path__approach__glide_path__glidepath__glide_slope__glideslope  the final path followed by an aircraft as it is landing
  subtype:  traffic_pattern__trafficpattern__approach_pattern__pattern  the path that is prescribed for an airplane that is preparing to land at an airport; "the traffic patterns around O'Hare are very crowded"; "they stayed in the pattern until the fog lifted"
  subtype:  flight_path  the path of an aircraft or rocket through the air
  subtype:  beat.itinerary__round  a regular route for a sentry or policeman; "in the old days a policeman walked a beat and knew all his people by name"
  subtype:  bus_route__busroute  the route regularly followed by a passenger bus
  subtype:  line_of_flight  the path along which a freely moving object travels through the air
  subtype:  line_of_march.itinerary__lineofmarch  the route along which a column advances
  subtype:  celestial_orbit__celestialorbit__orbit  the (usually elliptical) path described by one celestial body in its revolution about another; "he plotted the orbit of the moon"
     subtype:  geosynchronous_orbit  a circular orbit around the Earth having a period of 24 hours
        subtype:  geostationary_orbit__geostationaryorbit  a geosynchronous orbit that is fixed with respect to a position on the Earth
  subtype:  electron_orbit__orbit  the path of an electron around the nucleus of an atom
  subtype:  beeline  the most direct route; "he made a beeline for the bathroom"
  subtype:  circuit.itinerary  an established itinerary of venues or events that a particular group of people travel to; "she's a familiar name on the club circuit"; "on the lecture circuit"; "the judge makes a circuit of the courts in his district"; "the international tennis circuit"
  subtype:  crosscut  a diagonal path
  subtype:  supply_line__supply_route  a route over which supplies can be delivered
  subtype:  line_of_fire  the path of a missile discharged from a firearm
  subtype:  migration_route__migrationroute__flyway  the geographic route along which birds customarily migrate
  subtype:  fairway.itinerary  the usual course taken by vessels through a harbor or costal waters
  subtype:  direction.itinerary__way  a line leading to a place or point: "he looked the other direction"; "didn't know the way home"
     subtype:  bearing.direction__heading__aim  the direction or path along which something moves or along which it lies
        subtype:  tack.bearing  the heading or position of a vessel relative to the trim of its sails
     subtype:  course.direction__trend  general line of orientation: "the river takes a southern course"; "the northeastern trend of the coast"
     subtype:  tendency.direction__trend  a general direction in which something tends to move: "the shoreward tendency of the current"; "the trend of the stock market"
  subtype:  trade_route__traderoute  a route followed by traders (usually in caravans)
     instance:  Silk_Road
  subtype:  Northwest_Passage  a water route between the Atlantic and the Pacific Oceans along the northern coast of North America; Europeans since the 16th century had searched for a short route to the Far East before it was successfully traversed by Roald Amundsen (1903-1906)

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