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Originally Posted by wetwarev7
As stated above, if you have time, plot the ships position on the map, wait either 3 or 6 or 30 or 60 mintues and then plot the position again. the speed is roughly:
3 minutes: 20Xdistance=speed
6 minutes: 10Xdistance
30 minutes: 2Xdistance
60 mintues: 1Xdistance.
Any of these will give you a halfway decent estimate of speed. Obviuosly, the longer the time, the more accurate the estimate.
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3 minutes wasn't accurate enough for me. I tested it out on the torpedo training mission and it always came 1 knot faster than the target's actual speed. This usually meant I was hitting the bow of target.
I've found 5 minutes to be accurate enough and have had 70% hit accuracy so far.
5 minutes: 12xdistance=speed
However I wish the ruler on the nav map was more exact. I have to guess because the distance marked between the two points is very rarely at that tenth of an nm mark. Example: ruler says .5nm but it's really closer to .58nm