SINGAPORE continued to be the world's largest fuelling stop for ships last year, according to Business Times. Preliminary figures released by the Port of Singapore Authority (PSA) show that the island-nation sold 16.6 million tonnes of bunkers to vessels, up 2.7 per cent on the 1992 figure. Singapore has been the world's largest bunkering port since 1988. According to the latest figures, it sold about 1.45 million tonnes of bunkers in January, down 5 per cent from the previous January. Last year's figures were highlighted at a press conference organised by the Singapore Institute of Standards and Industrial Research (Sisir) recently. The conference was on Singapore's appointment as the leader of a team of international shipping and petroleum experts who are drafting an ISO standard on bunkering. The proposed standard, called ''Petroleum products - Practical procedures for the transfer of bunker fuels to ships'', will cover the transfer process, qualitative and quantitative measurements of bunkers and the settlement of disputes during transactions. The team's convenor is KMP Coastal Oil executive director Lim Li-lian. The team, chaired by Ms Lim, will hold its second meeting tomorrow and on Thursday in conjunction with the Singapore International Bunkering Conference 1994. According to Sisir, one factor which tipped the scales in favour of Singapore's appointment as convenor is that it is the only country with a national standard on bunkering procedures. The Singapore Bunkering Procedure was jointly developed by the Singapore National Shipping Association and the PSA. It will be referred to during the drafting of the international standard.