I suspect your problem may be the use of the nomograph, if you dont draw the line exactly where it should be you could be off a little bit, and a small error in speed will ofter result in a miss. I divide the distance travelled by the time in minutes to get yds per minute and convert to knots based on a chart I made up. It works most of the time but I still get more misses than I should. I did find out that if you get detected the ships will change speed, and that had messed me up a few times. Taking multiple speed estimates over a period of time is the best way. The crew estimates are only good at close range and when visibility is good so you know you are getting an accurate placement of the split image, which is difficult to do in bad weather or heavy seas. I would keep experimenting and modifying your method until you get results, I think your basic method is sound. Joe S
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