Indispensable Reef
Coordinates: 12°40′S 160°25′E / 12.667°S 160.417°E
The Indispensable Reefs are a chain of three large coral atolls in the Coral Sea. They are located about 50 km (30 mi) south of Rennell Island, separated from it by Rennel Trough. The chain stretches over a length of 114 km (71 mi) and its average width is 18 km (11 mi).
Administratively the Indispensable Reef belongs to the Rennell and Bellona Province of the Solomon Islands.
The three atolls are steep-to and each encloses a large deep lagoon. They are separated by deep passages two to three km (1.2–1.9 mi) wide. of the Indispensable Reef are aligned in a NW-SE direction:
The ship Neptune struck Indispensable Reef on August 3, 1868 and was lost. The crew was rescued by the SS Boomerang.
During the Battle of the Coral Sea on May 7, 1942, a two Japanese carrier attack planes B5N2 (EI-306 and probably EI-302) flying reconnaissance mission from the carrier Shokaku ditched on Indispensable Reef due to lack of fuel.
In the 1980s the Solomon Islands Government apprehended a vessel from Taiwan that had been poaching the giant clam stocks of Indispensable Reef. Corals and endangered fish species are also being plundered for the aquarium trade.
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