evidence: In the Spratly Island chain, China occupies and has undertaken large-scale land reclamation activities on seven geographic features over which the Philippines also claims sovereignty. Since a stand-off with the Philippines in 2012, China has also controlled Scarborough Shoal. Because different categories of features generate different levels of maritime rights under UNCLOS, the Philippines' case seeks a ruling from the tribunal on the physical status of each of those China-occupied features. The Philippines also seeks a ruling on the physical status of Second Thomas Shoal, a geographic feature located 105 nautical miles west of the Philippine island of Palawan that is claimed by both the Philippines and China. The Philippines beached a landing craft, the BRP Sierra Madre, on the shoal in 1999. With the condition of the BRP Sierra Madre deteriorating and China harassing Philippine navy ships seeking to resupply the military personnel stationed on it, many analysts consider the Philippines' control of Second Thomas Shoal to be tenuous.18