From Academic Kids
See also Trowe, a type of troll.
A trow was a type of cargo boat found in the past on the River Severn in England. The mast could be taken down so that the trow could go under bridges, such as the bridge at Worcester, England. The mast was stepped in a three sided frame open at the rear but closed with an iron pin or rope lashing. From the top of the mast a forestay ran down to the bow winch. To lower the mast the pin was removed and the winch slackened off to let the mast fall towards the stern. The reverse operation pulled the mast up. Trows were sea-worthy, as with an added keel they could take 90 tons of salt from Droitwich to France across the English Channel. The flat bottomed Trows sailed on the sea by hauling a twenty foot log of wood under the hull strapped with chains to give 'grip' and stop the hull sliding sideways.