Ranai Airport — Ranai-Natuna Besar Island, Indonesia

NTX is Ranai Airport, located on Natuna Besar Island in Indonesia's Natuna Regency, near the South China Sea. The airport serves a strategically significant but sparsely populated island chain, functioning as both a civilian airport and a base supporting Indonesian military presence in the contested South China Sea region. NTX connects Natuna to larger Indonesian cities, providing a lifeline for residents and government personnel given the islands' remote location far from Indonesia's main population centers. Beyond civilian transport, Ranai has gained attention due to Indonesia's efforts to bolster its military footprint near the Natuna waters amid regional maritime disputes. The airport's dual civilian-military role makes it a notable, if modest, piece of Indonesian strategic infrastructure.