In a message dated 6/23/03 1:51:53 PM Eastern Daylight Time, don@dlschaefer.com writes: << A recent insurance survey of my boat, a 1973 wood hulled, single diesel, 38' trawler, required that I install an automatic fire extinguisher in the engine room area, which is estimated at approximately 500 cubic feet of volume. Any other listees have similar experiences and recommendations regarding an economical and effective system? >> Yes, it was recommended for my last survey too. I put in a big Kidde FyreWatch container and they seemed happy. I went with the FE241 gas. When you are calculating volume be sure to remove the volume of objects located in your engine room such as fuel tanks, engine blocks, generator/sound shields and holding tanks. Your hull also is not a square, it tapers on the bottom and side. This could make a significant difference in the price and size of your unit. Be safe, Al Johnson 34' Marine Trader "Angelina"