The Marine Services team provides and maintains more than 60 permanent aids to navigation, including 38 floating buoys, 18 fixed buoys and central London bridge lights.
The team is also responsible for installing and maintaining any temporary buoys to mark obstructions, and for the maintenance of tide gauges located at strategic points along the River.
The LED lamps give a brighter and clearer light, which is easier for mariners to see. Requiring much less maintenance, they are more reliable - usually lasting for about ten years, whereas conventional lamps need to be replaced twice a year.
PLA Marine Services is also responsible for the inspection and upkeep of more than 230 PLA moorings.