A trow was a type of cargo boat found in the past on the rivers Severn and Wye in Great Britain and used to transport goods.
The mast was stepped in a three sided frame open at the rear but closed with an iron pin or rope lashing.
Despite their flat-bottomed hull form which made volume available for their load and permitted drying out on muddy banks in the tidal area where they operated, Trows were seaworthy.
A replica Wye trow, named Hereford Bull, was constructed in 2012 to participate in the Thames Diamond Jubilee Pageant.
A reliable source states that "she was originally sloop rigged, with a jib, staysail, topsail and gaff main," as well as a mast believed to have been fixed.
Unlike the River Severn version the Fleet variant is only ever towed, rowed or punted and has no mast or sail.