The landing barges and recreational offshore sportfishing boats are docked in the marina. During World War II, PT boats engaged enemy warships, transports, tankers, barges, and sampans. Seabee pontoon barges and causeways brought MacArthur's Forces ashore. Guinness had a fleet of ships, barges and yachts. Private capital followed these improvements with heavy investments in towboats and barges. It turned out to be a trawler towing barges. Building materials were transported to the construction site on barges up the Ouse River Navigation. The waterway was also constructed from scratch, complete with barges and donkeys crossing humpback bridges. Nine of the barges which had sunk floated back. Many float on barges down the Congo River. It also allows large freight barges to navigate up to Baghdad. In 1920 freight traffic recovered rapidly with the arrival of motorised barges. Two stages were created out of floating barges. The use of the topsail in Thames sailing barges is significantly different. The depth also allows for commerce throughout the river on barges.