Analyst: Philippines hesitant to upgrade facilities in disputed sea By Patricia Lourdes Viray(Philstar.com) - August 2, 2015 - 9:01pm Facebook Twitter Pag-asa (Thitu) Island, is the second largest of the naturally occurring Spratly (Kalayaan) Islands and the largest of the Philippine-administered maritime features in the South China Sea. Unahai image