Union Banks

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)^[1] west of the Philippine coast, containing islands and reefs whose ownership remains disputed and controversial.^[2] 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.

Map of Union Banks

Vietnamese structure on Collins Reef (Đá Cô Lin)

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.^[3]

Islands and reefs comprising Union Banks

Union Banks consists of the following islands and reefs, clockwise starting in the southwest corner:^[4][5]

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

Feature	Location
Johnson South Reef (Chìguā Jiāo) (Mabini Reef) (Đá Gạc Ma)	09°43′9″N 114°16′57″E
Collins Reef/Johnson North Reef (Guǐhǎn Jiāo) (Roxas Reef) (Đá Cô Lin)	09°46′14″N 114°15′27″E
Đá Tam Trung	09°50′12″N 114°16′6″E
Loveless Reef [zh] (Huá Jiāo) (Đá Nghĩa Hành)	09°51′13″N 114°16′47″E*
Gent Reef [zh] (Jíyáng Jiāo) (Đá Sơn Hà)	09°52′45″N 114°18′21″E
Sin Cowe Island/Sinh Ton Island (Jǐnghóng Dǎo) (Rurok Island) (Ching-hung Tao) (Đảo Sinh Tồn)	09°53′9″N 114°19′46″E
Edmund Reef [zh] (Nánmén Jiāo) (Đá Bình Khê)	09°53′48″N 114°23′40″E*
McKennan Reef [zh]/Kennan Reef (Xīmén Jiāo) (Đá Ken Nan)	09°54′12″N 114°27′56″E
Đá Bia	09°53′42″N 114°29′40″E
Hughes Reef (Dōngmén Jiāo) (Tung-men Chiao) (Đá Tư Nghĩa)	09°54′51″N 114°29′45″E
Hallet Reef [zh] (Ānlè Jiāo) (Đá Bình Sơn)	09°55′55″N 114°31′25″E*
Holiday Reef [zh] (Chángxiàn Jiāo) (Đá Bãi Khung)	09°57′55″N 114°33′53″E
Empire Reef [zh] (Zhǔquán Jiāo) (Đá Đức Hòa)	09°58′44″N 114°35′23″E*
Whitsun Reef/Whitson Reef (Niúè Jiāo) (Julian Felipe Reef) (Đá Ba Đầu)	10°00′10″N 114°39′58″E
Ross Reef [zh] (Rǎnqīngdōng Jiāo) (Đá An Bình)	09°54′25″N 114°35′52″E
Grierson Reef/Sin Cowe East Island (Rǎnqīng Shāzhōu) (Jan-ch'ing Chiao) (Đảo Sinh Tồn Đông)	09°54′8.2″N 114°33′50.7″E
Bamford Reef [zh] (Lóngxiā Jiāo) (Đá Vị Khê)	09°53′25″N 114°32′7″E
Tetley Reef [zh] (Biǎncān Jiāo) (Đá Ninh Hòa)	09°52′5″N 114°30′39″E
[Unnamed reef]	09°51′5″N 114°29′29″E
Jones Reef [zh] (Zhāngxī Jiāo) (Đá Văn Nguyên)	09°49′47″N 114°27′57″E
Higgens Reef [zh]/Higgen Reef (Qūyuán Jiāo) (Đá Phúc Sĩ)	09°48′49″N 114°24′12″E
Lansdowne Reef (Qióng Jiāo) (Pagkakaisa Reef) (Chi'ung Chiao) (Đá Len Đao)	09°46′43″N 114°22′14″E

Chigua Jiao (Johnson South Reef)

Đá Cô Lin
(Collins Reef,
Johnson North Reef)

Loveless Reef

Gent Reef

Sinh Tồn (Sin Cowe Island)

Edmund Reef

McKennan Reef

Dōngmén Jiāo (Hughes Reef)

Hallet Reef

Holiday Reef

Empire Reef

Whitson Reef

Ross Reef

Sinh Tồn Đông (Grierson Reef/ Sin Cowe East Island)

Bamford Reef

Tetley Reef

unknown Reef

Jones Reef

Higgens Reef

Đá Len Đao (Landsdowne Reef)

See also

• List of maritime features in the Spratly Islands