Lansdowne Reef

Lansdowne Reef (Filipino: Bahura ng Pagkakaisa; Len Đao Reef Vietnamese: Đá Len Đao; Chinese: 琼礁; pinyin: Qióng jiāo), is a cay on the southern part of the Union Banks of the Spratly Islands in the South China Sea. The island has been occupied by Vietnam since 1988. It is also claimed by China (PRC), the Philippines, Vietnam, and Taiwan (ROC).^[1][2][3]

Lansdowne Reef

Disputed island
Lansdowne Reef
Lansdowne Reef
Other names	Đá Len Đao (Vietnamese) Pagkakaisa Reef (Philippine English) Bahura ng Pagkakaisa (Filipino) 琼礁 Qióng jiāo(Chinese)
Geography
Location	South China Sea
Coordinates	9°46′46″N 114°22′11″E
Archipelago	Spratly Islands
Area	4 ha (9.9 acres)
Administration
Vietnam
District	Trường Sa District
Commune	Sinh Tồn Commune
Claimed by
China
Philippines
Taiwan

Geography

Len Dao Reef is located 6.4 nautical miles (11.8 km) northeast of Gac Ma Reef and 6.8 nautical miles (12.6 km) south-southeast of Sinh Ton Island. Geographically, Len Dao Reef is not an island but a coral reef. When the tide is low, the coral reef rises approximately 0.5 meters; conversely, when the tide is high, the reef submerges 1.8 meters below water.^[4] The area of the coral reef is approximately 0.58 square kilometers.^[5]

The Vietnamese Navy is stationed on a complex of structures called Len Dao Island, with geographical coordinates recorded on the sovereignty marker as 9°45′40″N 114°21′50″E. There is also a stone cultural house completed in 2018.

Starting in June 2025, Vietnam began land reclamation activities at Len Dao Reef. The island expanded to a total of 4 hectares.^[6]

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

• Spratly Islands dispute