I want to tell you about the bunker delivery that taught me never to sign a delivery note based on a barge's numbers alone. The barge's flow meter showed 380.4 metric tons delivered. Their delivery note said the same number. Everything matched. Which felt like confirmation. It wasn't. It was two numbers generated by the same party agreeing with each other. My own sounding, before and after, with proper temperature correction, told a different story. My tanks showed a receipt of approximately 351 metric tons. A shortfall of nearly 30 metric tons. At the fuel prices back then, that gap was worth roughly eighteen thousand dollars. Here's what I want to be honest about: this wasn't actually my first shortage. There had been a smaller one, years earlier. And the first time, I did what almost every engineer does the first time: I assumed I had made the error. I second-guessed my own sounding. I wondered if the tank tables were off. I convinced myself the barge's numbers were probably right. I signed the note. Not because I believed it. Because I didn't yet trust my own verification enough to challenge a barge operator who does this daily. It took the second, much larger shortage to stop assuming I was the one making the mistake. I wrote the full story at chiefengineerlog.com — what actually creates a 30-ton gap, the conversation on the manifold, and what I do differently on every delivery since. Read it at chiefengineerlog.com — link in comments. Subscribe for real field stories, not textbook theory. #BunkerDelivery #MarineFuel #ChiefEngineer #MarineEngineering #FuelManagement #chiefengineerlog