Coral Reefs, Part 2 Codexery

Vanguard Bank

Submerged reef group with Vietnamese DK1 platforms and disputed sovereignty.

Vanguard Bank

Vanguard Bank is a group of submerged coral reefs southwest of the Spratly Islands in the South China Sea. It is notable for hosting steel structures called DK1 platforms, installed by Vietnamese authorities, and for being a site of competing territorial claims between Vietnam and China.

Quick Facts

Disputed
yes
Other Names
Bãi Tư Chính (Vietnamese) / 万安滩 Wàn'ān Tān (Chinese)
Location
South China Sea
Archipelago
Spratly Islands
Country Admin Divisions Title
Province
Country Admin Divisions
Bà Rịa–Vũng Tàu

Facts from the source article.

Lore & Background

Vanguard Bank was originally placed under the jurisdiction of the Con Dao Special Zone, Ho Chi Minh City. Vietnam began installing steel-framed DK1 platforms in 1989, with later designs modeled after deep-water drilling rigs. Three platforms are currently operational: DK1/11 completed on May 5, 1994; DK1/12 completed on August 8, 1994; and DK1/14 completed on April 20, 1995. Garrisoned personnel belong to the DK1 Battalion, originally under the 171st Brigade of the Vietnam People's Navy, later reassigned to the 2nd Regional Command. Two operational lighthouses, each with a tower height of 22 meters and a luminous range of 12 nautical miles, emit white light with different flashing patterns.

Reader's Guide

Vanguard Bank's significance lies in its role as a site of active infrastructure development and territorial dispute. Vietnam asserts exclusive rights to construct and regulate installations on the bank under UNCLOS 1982 Articles 60 and 80, and states it does not intentionally turn the submerged bank into an island. China, through historical name changes from Qianwei Bank to Wan'an Bank, considers Vanguard Bank part of the Nansha Islands and an indivisible part of Chinese territory. The international legal context notes that submerged features are not subject to separate sovereignty claims unless within historic waters or another feature's exclusive economic zone, and that coastal states exercise only sovereign rights over the continental shelf for resource exploration and exploitation, without sovereignty. The bank's legacy is thus tied to competing legal interpretations and physical occupation via platforms and lighthouses.

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