What the ... holy ... ???
You don't actually need to calculate this stuff. The mechanical computer on your boat does. You just need three inputs:
1) Range (the system is a bit off, but you can get it by trial and error or installing one of the fix mods)
2) AOB (either estimate it visually, which is often flawed, or by protractor -- it's the angle between the target's course and a straight line to your boat)
3) Speed (the stopwatch method is broken, hopefully will be fixed, so better to do it by marking location, waiting a specific period of time, and then marking a second location, then multiplying up to get the distance in nm you WOULD have gotten if the interval had been one hour).
Right now I don't use 100% -- it's really unfair with all the broken range-finding and speed-measurement tools -- I still allow the contacts to appear on the map. If you do this, it's relatively easy to enter a solution then look at your battle map to see how accurate it is (in all three inputs) and make adjustments accordingly.
Unless you LIKE doing math ...
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