https://www.webcitation.org/query?url=http://www.geocities.com/Athens/Academy/5386/shipwreck.htm%3F200619&date=2009-10-25+15:54:06 Page about the trow Effort, also known as the Kempsey Shipwreck] Accessed 26 May 2017 The flat-bottomed trows sailed on the sea by hauling a 20 feet log of wood under the hull strapped with chains to act as a temporary keel, to limit leeway (the hull sliding sideways under lateral sail pressure on their fore-and-aft rig). [