Satellite Imagery Confirms Philippines Building ~200m Jet-Capable Runway Extension at Thitu Island and New Sheltered Port at Lawak — Spratly Infrastructure Modernization Underway

Satellite imagery analyzed by Radio Free Asia and subsequently reviewed by GlobalSecurity.org and defense analysts revealed that the Philippines is implementing two significant Spratly Islands infrastructure projects as of May 2026. At Thitu Island (Pag-asa), Philippines' largest occupied Spratly feature, construction has extended the Rancudo Airfield runway by approximately 200 meters over previously submerged land — a modification funded at 1.65 billion pesos (~$29M USD) in the Philippines' 2025 defense budget. The existing 1,300m runway could not accommodate jet fighters; the extended runway is assessed as potentially enabling F-16V operations or similar combat aircraft — consistent with the Philippines' $5.5B US F-16V acquisition approved in April 2025. At Lawak Island (Nanshan Island), approximately 155 nm northeast of Thitu, the Philippines is constructing a sheltered harbor with an improved vessel entry channel to replace the existing shallow-water access. The Lawak project is budgeted at approximately 1 billion pesos (~$18M). EurasiaReview's defense analysis characterized both projects as part of Philippines' broader Horizon 3 modernization strategy to upgrade its Spratly outposts from deteriorating WWII-era facilities to capabilities that can support sustained maritime patrol and, eventually, air combat operations. The timing — coinciding with Balikatan 2026's closing ceremony and the 48th ASEAN Summit — was assessed as deliberate messaging about Philippine resolve in the West Philippine Sea. China has not yet issued a formal protest specifically targeting the infrastructure projects documented in the RFA satellite imagery report. Thitu Island already hosts the new Coast Guard District Kalayaan Island Group command (activated April 9, 2026). The runway extension, if completed and certified for F-16 operations, would represent a qualitative shift in Philippines' Spratly deterrence: for the first time, a Philippine-administered Spratly feature would be able to host combat aircraft, extending air coverage over the disputed South China Sea without dependence on Palawan-based airstrips.