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junk 
Boat used in the Far East for fishing and transporting cargo; its sails are made of matting or canvas and are stretched by battens.
rudder 
Submerged component that pivots on a vertical axle and is used to steer the boat.
batten 
Rigid pole inserted into the sail’s batten pockets to maintain its shape.
foremast 
Mast nearest the prow of the boat.
mainmast 
Principal mast that is fixed approximately in the center of the boat.
mizzenmast 
Mast on the stern of the boat.