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Union Banks (Pagkakaisa Banks and Reefs) is a large drowned atoll in the center of Dangerous Ground in the Spratly Islands in South China Sea, 230 kilometres (120 nautical miles) west of the Philippine coast, containing islands and reefs whose ownership remains disputed and controversial. The closest atoll is Tizard Bank, 25 kilometres (13 nautical miles) due north of Union Banks. There are only two natural islands on the rim of the reef, Sin Cowe Island and Sin Cowe East Island.

The atoll is 55 kilometres (34 miles) long from Johnson South Reef in the southwest to Whitson Reef in the northeast, and up to 15 kilometres (9.3 miles) wide. Its total area measures 461 square kilometres (178 square miles). The central lagoon is up to 53 metres (174 feet) deep.

Islands and reefs comprising Union Banks

Download coordinates as:

• KML
• GPX (all coordinates)
• GPX (primary coordinates)
• GPX (secondary coordinates)

Union Banks consists of the following islands and reefs, clockwise starting in the southwest corner:

Key: yellow = occupied by PRC; violet = occupied by Vietnam

See also

• List of maritime features in the Spratly Islands

References

1. "China expanding presence on Mabini reef". ABS CBN News / Kyodo News. 13 May 2014. Retrieved 20 May 2014.
2. Dato Mohammad, Brigadier General (1991). The Conflicting Claims in the South China Sea. PA, USA: U.S. Army War College.
3. Atoll Area, Depth and Rainfall, rock.geosociety.org
4. China Sea Pilot - Volume II - NP 31. Taunton: United Kingdom Hydrographic Office. 2012.
5. "Digital Gazetteer of Spratly Islands". www.southchinasea.org. Archived from the original on 2007-07-17. Retrieved 2008-02-08.
   - Version dated 19 August 2011 is available at: "Digital Gazetteer of Spratly Islands". www.southchinasea.org. 19 August 2011. Retrieved 5 June 2014. This list includes the names of all Spratly features known to be occupied and/or above water at low tide.

v t e Spratly Islands
Confrontations	Southwest Cay incident (1975) East Sea Campaign (1975) Johnson South Reef Skirmish (1988)
Regions	Dangerous Ground Loaita Bank London Reefs North Danger Reef Reed Tablemount Tizard Bank Union Banks
Occupied features	Brunei Louisa Reef China Cuarteron Reef Fiery Cross Reef Gaven Reefs Hughes Reef Johnson South Reef Mischief Reef Subi Reef Malaysia Ardasier Reef Dallas Reef Erica Reef Investigator Shoal Mariveles Reef Swallow Reef Philippines Commodore Reef Flat Island Irving Reef Lankiam Cay Loaita Cay Loaita Island Nanshan Island Northeast Cay Second Thomas Shoal Thitu Island West York Island Taiwan Taiping Island Zhongzhou Reef Vietnam Alison Reef Amboyna Cay Barque Canada Reef Bombay Castle Central London Reef Collins Reef Cornwallis South Reef Discovery Great Reef East London Reef Grierson Reef Ladd Reef Lansdowne Reef Namyit Island Pearson Reef Petley Reef Sand Cay Sin Cowe Island South Reef Southwest Cay Spratly Island Tennent Reef West London Reef
Unoccupied features	First Thomas Shoal Half Moon Shoal Luconia Shoals Northeast Investigator Shoal Royal Captain Shoal Sabina Shoal Third Thomas Shoal Western Reef Whitsun Reef
Related articles	Spratly Islands dispute Free Territory of Freedomland "Great Wall of Sand" List of airports in the Spratly Islands List of maritime features in the Spratly Islands Philippines and the Spratly Islands Republic of Morac-Songhrati-Meads Territorial disputes in the South China Sea Nine-dash line

• Union Banks
• Banks of the Spratly Islands