Bombay Castle (South China Sea)



Bombay Castle, also known in Đá Ba Kè; Mandarin ; Abad Santos Shoal (Buhanginan ng Abad Santos), is a reef with a lighthouse in the Rifleman Bank of the southern Spratly Islands. It is occupied by Vietnam, but also claimed by China (PRC) and Taiwan (ROC).

Location and topography
Bombay Castle consists of a submerged reef located between 7.83333°N, 111.66667°W and 7.93333°N, 111.7°W (between 7.83333°N, 111.66667°W and 7.93333°N, 111.7°W) at the northern end of Rifleman Bank. At its shallowest point, it has a depth of 3 m consisting of sand and coral. It is 80 mi east of Huyền Trân (Alexandra Bank) and nearly 80 mi west of An Bang (Amboyna Cay).

Bombay Castle has a 22.5 m tall lighthouse on steel pilings that was built in 1995. The lighthouse is two storied, with accommodation for the lighthouse keepers and a dish antenna.

The reef is named after the East Indiaman Bombay Castle.

DK1 rigs
In addition to the lighthouse (DK1/21), three other DK1 rigs ("economic, scientific and technological service stations") have been constructed by Vietnam in this area. The current (2015) cluster has 3 rigs in use.
 * DK1/4: Completed 16 June 1989, was the 2nd DK1 rig completed. It collapsed on the night of 4 December 1990 during a heavy storm.
 * DK1/9: Completed 22 August 1993.
 * DK1/20: Completed 13 August 1998.
 * DK1/21: Completed 19 August 1998. This rig includes a lighthouse.