Filippo Reef is a reef that is asserted to be in the Pacific Ocean at Starbuck Island in the Line Islands. The reef was reported by the master of the Italian barque Filippo as having been seen on 28 June 1886. From an unidentified report of breakers dated 1926, it was estimated to have a water depth of only 0.6 to 0.9 metres (2 to 3 ft), and appeared to be about 1.6 kilometres (1.0 mi) long northwest to southeast, and less in width., 450 kilometres (280 mi) east of
Filippo Reef and the Line Islands.
The only sighting referenced shows a date of 1926. The topographic data supplied by the General Bathymetric Chart of the Oceans (GEBCO), however, shows a sea depth of 3.3 miles (5.3 km). It is therefore likely that this 1926 report is an error, and that Filippo Reef is a phantom island, and that therefore any maps showing it are relying on the 1926 report and are also in error.
Nevertheless, it is marked in the 2015 edition of the National Geographic Atlas of the World.
- Sailing Directions (Enroute), Pub. 126: Pacific Islands (PDF). Sailing Directions. United States National Geospatial-Intelligence Agency. 2017. p. 49.
- General Bathymetric Chart of the Oceans (GEBCO)
- "Filippo Reef". WolframAlpha.com. Archived from the original on 30 June 2013. Retrieved 7 May 2013.
- National Geographic Atlas of the World (10th ed.). Washington, D.C.: National Geographic. 2015. p. plate 109. ISBN 1-4262-1354-9.
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