#oar  an implement used to propel or steer a boat
  supertype:  implement  instrumentation (a piece of equipment or tool) used to effect an end
  part:  blade.rotating_mechanism
  subtype:  boat_paddle__paddle  a short light oar used without an oarlock to propel a canoe or small boat
  subtype:  short-handled_scull__shorthandledscull__scull  one of a pair of short-handled oars
  subtype:  long-handled_scull__scull  a long-handled oar mounted at the stern of a boat and moved left and right to propel the boat forward
  subtype:  sweep_oar__sweepoar__sweep  a long oar used in an open boat

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