The pole which tomonori (a rower at the stern) uses is 450cm long (tomozao (a stern pole)) and the one which nakanori (rower at the center) uses is 323cm long (nakazao (a center pole)).
棹は艫乗りの使うものは長さ1丈5尺（艫棹）、中乗の使うものは長さ8尺5寸（中棹）。