美济礁
The Philippine navy maintains a presence of less than a dozen navy personnel on the long Second World War US-built Philippine Navy landing craft BRP "Sierre Madre" (LT-57), which was deliberately run aground at the shoal in 1999 in response to the Chinese reclamation of Mischief Reef. The Philippines claims that the shoal is part of its continental shelf, while parts of the Spratly group of islands, where Second Thomas Shoal lies, are claimed by China, Brunei, the Philippines, Malaysia and Vietnam. In 2014, the Chinese government asked the Philippines to remove the grounded ship.