Chuuk Lagoon, also known as Truk Lagoon, is a sheltered body of water in the central Pacific. About 1800 km north-east of New Guinea, it is located mid-ocean at 7 degrees North latitude, and is part of Chuuk State within the Federated States of Micronesia. The atoll consists of a protective reef, 225 kilometres (140 mi) around, enclosing a natural harbour 79 by 50 kilometres (49 by 30 mi), with an area of 2,130 square kilometres (820 sq mi).