by a Lindberg light (which burned petroleum naphtha). At the same time Trinity House began experimenting with the application of lamps to buoys, using Pintsch's oil-gas system, beginning with three in the Thames Estuary (East Oaze, Ovens and Sheerness Middle); the experiment was deemed a success and subsequently further buoys and beacons were lit by Trinity House using the same system, in the Estuary and beyond. Today the Port of London Authority's Thames Navigation Service (established in 1959) is responsible for buoyage, beaconage and bridge lights on the Tideway. Trinity House remains responsible for aids to navigation in the wider estuary (and beyond). Thames estuary navigation marks This table shows, from west to east, the principal navigation lights, buoys and other marks to the north (port) and south (starboard) of the main deep-water channels of the River Thames from Gallions Reach to the Sunk Light Float. The Thames is in IALA region A so port buoys are red and starboard buoys are green. References Notes External links Locations of deeps and shallows and buoys in the Thames estuary Coastal environment of Essex Estuaries of England Landforms of Kent Ramsar sites in England