Using the stadimeter to estimate speed is really hit or miss, for a variety of reasons. The easiest way to get your target's speed is to measure the distance it travels in 3 minutes (or 3 minutes 15 seconds if you're using metric): the distance traveled in yards (or meters) divided by 100 is its speed in knots.
If you want to use a properly working stadimeter, I highly recommend using the Optical Targeting Correction (or OTC) mod. There's a TMO-compatible version for it available
here.
darqen27, you'll have to excuse my fellow Greeks. It's not every day we stumble upon each other in an SH4-related forum
