I have never heard of a "bunker coordinator'. I did a Google search,and found this job description. Bunker Coordinator Handling of vessels Responsible for oil bunkering activities Advise clients and customers of bunker grades and specification available at various ports Work closely with different agents at various ports for delivery of bunkers for vessels Identify trading opportunities and negotiate with suppliers and customers Establish good supplier and client relationship Recommending clients on the most cost-efficient way for their bunker needs Can't say I am much wiser - although bunker fuel appears to be some sort of crude oil used aboard ships. As to how to describe this in Chinese, Spanish, English, or indeed any other language, I am afraid I have no idea. Sorry - hopefully someone else can shed some light on this.