Singapore bunkers seen little impacted by VPS sediment content alert: sources The recent alert issued by Veritas Petroleum Services on the presence of high sediment content in several bunker fuel samples it tested from Singapore will likely have a relatively muted impact on the market, industry sources told S&P Global Platts March 31. “We haven’t heard anything major from our side,” a source at another testing firm said. Singapore is the world’s largest bunkering port. It is also located along one of the world’s busiest waterways. A ship calls at the Singapore port every two or three minutes — a total of around 130,000 ships a year.