LETTERS

摘要

With regard to the article on how much duty to pay on fuel (CB, July), I used a much simpler method of calculation when I had a boat. 1. I noted the engine hours at the start and end of each year, enabling me to calculate how long the engine had run in the year 2. I also logged where I went, so I knew how far I'd gone that year 3. I then calculated how many hours I had been cruising (assuming a conservative speed - say 2.5mph) 4. I then calculated the cruising time as a percentage of total engine hours to give my propulsion percentage, which I used throughout the following year 5. I carried copies of my calculations to show the fuel vendor (generally they weren't interested, though) Although crude, it was simple and gave some support to my percentage figure, should it ever be challenged (it wasn't).