Lyra Reef is a remote submerged coral atoll, about in diameter, extending over an area of . It lies about north-east of New Ireland in the Bismarck Archipelago of Papua New Guinea, and north-east of Simberi Island, the closest island, and about the same distance north-west of the Nuguria Islands. The depths around the perimeter of the reef are generally less than and in places are less than . The least depth is on its north side. Within the reef, in the lagoon, there are depths of exceeding . A gap on the north-west side of the reef gives access to this deep water. Depths of more than are found within of the reef. See also List of reefs References External links Nautical chart of Lyra Reef Reefs of Papua New Guinea Coral reefs