'Filippo Reef' is a submerged, reef-topped
seamount located in shallow water 450 km east of
Starbuck Island in the
Line Islands at . From the breakers it has been estimated to have a least water depth of only 0.6 to 0.9 meters. It is about 1.6 km long northwest to southeast, and less in width. The reef was first reported by the Italian barque ''Filippo'' on June 28, 1886.
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nautical description