The Singapore Strait, a vital chokepoint connecting the Indian Ocean to the South China Sea, sees heavy traffic due to its strategic location and Singapore’s status as the world’s largest bunkering hub. Ships refuel here before continuing their journeys, adding to the congestion. The adjacent Singapore’s Eastern Outer Port Limits (East OPL) extends the busy zone eastward, as ships leaving the strait often anchor there for cargo, bunkering, or supplies. This concentration of maritime activity, from transiting traffic to anchoring and refueling, makes both the Strait and East OPL a congested area requiring constant management for smooth and safe passage, but only the Strait is constantly supervised by the Singapore Vessel Traffic Service (VTS) and not the Eastern OPL.