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Supply Reef is an active submarine volcano located at latitude 20 09’N, longitude 145 6’E, approximately 547 km north of Saipan. It lies about 10 km northwest of Maug Island and is joined to Maug by a saddle at a depth of approximately 1600 m. Its shallowest point is 7.9 m as determined by multibeam mapping done in 2007. Hard and soft corals have been observed on Supply Reef by divers and underwater cameras. more ...
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