#drift  the gradual departure from an intended course due to external influences (as a ship or plane)
  supertype:  #natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  #leeway  (of a ship or plane) sideways drift

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