V Bala, a partner in Rajah & Tann Singapore’s Shipping & International Trade practice group, has highlighted the critical importance of preserving evidence in the first 48 hours of a bunker incident, outlining best practices for ship managers to protect potential claims and defences: A vessel somewhere in the Indian Ocean reports abnormal fuel behaviour. Sludge is forming. Filters are clogging. Consumption looks wrong. Within hours, owners, charterers, managers, suppliers and insurers are exchanging messages. Everyone asks the same question: is there a claim? It is reasonable. It is also often premature. The better question is: what evidence will still exist in 48 hours to explain what happened? For all the technical sophistication around modern bunker disputes, many are decided less by expert reports than by the first two days after trouble appears. The tribunal may sit years later. The factual foundation is usually laid before the vessel reaches its next port. Bunker claims are commonly treated as technical contests about fuel specifications, ISO standards and competing laboratory results. They are that. But experienced litigators quickly notice a simpler pattern: the strongest cases are rarely built by the cleverest lawyers. They are built by the best recordkeepers. The Vanishing Evidence Problem Unlike a collision, fire or grounding, bad bunkers leave few obvious visual traces. The evidence is scattered across tanks, samples, engine records, maintenance logs, performance data and electronic communications. Much of it can deteriorate, disappear or become contaminated with surprising speed. A discarded sample cannot be recreated. A cleaned filter may tell a different story from one preserved immediately after failure. Electronic records overwritten in routine operations may never be recovered usefully. Crew change. Memories fade. The difficulty is that bunker incidents rarely feel like casualties when they first arise. They look like operational nuisances.