One Fathom Bank Lighthouse

The One Fathom Bank Lighthouse refers to two offshore lighthouses in the Strait of Malacca, specifically, on a shoal within Malaysian waters, dubbed One Fathom Bank, off the coast of the state of Selangor.The One Fathom Bank station originally consisted of a single screw-pile lighthouse that has been replaced twice over the course of its 147 years in service, but saw the addition of a newer, larger counterpart close by that superseded duties of the older lighthouse in 1999. The lighthouses have since been referred to as the "old" One Fathom Bank Lighthouse and the "new" One Fathom Bank Lighthouse; the old One Fathom Bank Lighthouse is retained but is currently inactive.As neither lighthouse is located on any body of dry land, both locations are only accessible by boat. While both sites of the lighthouses are open, their towers remain off-limits.HistoryFirst reported during the mid-19th century by John Turnbull Thomson, a hydrographic surveyor, One Fathom Bank is a shoal located in the Strait of Malacca, between North Sands and South Sands, 30km southwest from the Klang Delta in Selangor. The sandbank had apparently emerged during low tide, with water depths of less than two and a half fathoms (4.6 m).