A large network of coastal buoys near the United States is maintained by the National Data Buoy Center,[19] with deployment and maintenance performed by the United States Coast Guard.[20] For South Africa, the South African Weather Service deploys and retrieves their own buoys, while the Meteorological Service of New Zealand performs the same task for their country.[21] Environment Canada operates and deploys buoys for their country.[22] The Met Office in Great Britain deploys drifting buoys across both the northern and southern Atlantic oceans.[23]